mirror of
https://github.com/discordjs/discord.js.git
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chore: ignore index files in coverage (#8293)
Co-authored-by: ckohen <chaikohen@gmail.com>
This commit is contained in:
Almeida
791
packages/collection/src/collection.ts
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791
packages/collection/src/collection.ts
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@@ -0,0 +1,791 @@
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/* eslint-disable @typescript-eslint/restrict-template-expressions */
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/**
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* @internal
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*/
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export interface CollectionConstructor {
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new (): Collection<unknown, unknown>;
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new <K, V>(entries?: ReadonlyArray<readonly [K, V]> | null): Collection<K, V>;
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new <K, V>(iterable: Iterable<readonly [K, V]>): Collection<K, V>;
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readonly prototype: Collection<unknown, unknown>;
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readonly [Symbol.species]: CollectionConstructor;
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}
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/**
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* Represents an immutable version of a collection
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*/
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export type ReadonlyCollection<K, V> = ReadonlyMap<K, V> &
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Omit<Collection<K, V>, 'forEach' | 'ensure' | 'reverse' | 'sweep' | 'sort' | 'get' | 'set' | 'delete'>;
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/**
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* Separate interface for the constructor so that emitted js does not have a constructor that overwrites itself
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*
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* @internal
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*/
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export interface Collection<K, V> extends Map<K, V> {
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constructor: CollectionConstructor;
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}
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/**
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* A Map with additional utility methods. This is used throughout discord.js rather than Arrays for anything that has
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* an ID, for significantly improved performance and ease-of-use.
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*/
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export class Collection<K, V> extends Map<K, V> {
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/**
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* Obtains the value of the given key if it exists, otherwise sets and returns the value provided by the default value generator.
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*
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* @param key - The key to get if it exists, or set otherwise
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* @param defaultValueGenerator - A function that generates the default value
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*
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* @example
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* collection.ensure(guildId, () => defaultGuildConfig);
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*/
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public ensure(key: K, defaultValueGenerator: (key: K, collection: this) => V): V {
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if (this.has(key)) return this.get(key)!;
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if (typeof defaultValueGenerator !== 'function') throw new TypeError(`${defaultValueGenerator} is not a function`);
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const defaultValue = defaultValueGenerator(key, this);
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this.set(key, defaultValue);
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return defaultValue;
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}
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/**
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* Checks if all of the elements exist in the collection.
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*
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* @param keys - The keys of the elements to check for
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*
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* @returns `true` if all of the elements exist, `false` if at least one does not exist.
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*/
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public hasAll(...keys: K[]) {
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return keys.every((k) => super.has(k));
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}
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/**
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* Checks if any of the elements exist in the collection.
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*
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* @param keys - The keys of the elements to check for
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*
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* @returns `true` if any of the elements exist, `false` if none exist.
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*/
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public hasAny(...keys: K[]) {
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return keys.some((k) => super.has(k));
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}
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/**
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* Obtains the first value(s) in this collection.
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*
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* @param amount - Amount of values to obtain from the beginning
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*
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* @returns A single value if no amount is provided or an array of values, starting from the end if amount is negative
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*/
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public first(): V | undefined;
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public first(amount: number): V[];
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public first(amount?: number): V | V[] | undefined {
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// eslint-disable-next-line @typescript-eslint/no-unsafe-return
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if (typeof amount === 'undefined') return this.values().next().value;
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if (amount < 0) return this.last(amount * -1);
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amount = Math.min(this.size, amount);
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const iter = this.values();
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// eslint-disable-next-line @typescript-eslint/no-unsafe-return
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return Array.from({ length: amount }, (): V => iter.next().value);
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}
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/**
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* Obtains the first key(s) in this collection.
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*
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* @param amount - Amount of keys to obtain from the beginning
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*
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* @returns A single key if no amount is provided or an array of keys, starting from the end if
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* amount is negative
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*/
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public firstKey(): K | undefined;
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public firstKey(amount: number): K[];
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public firstKey(amount?: number): K | K[] | undefined {
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// eslint-disable-next-line @typescript-eslint/no-unsafe-return
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if (typeof amount === 'undefined') return this.keys().next().value;
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if (amount < 0) return this.lastKey(amount * -1);
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amount = Math.min(this.size, amount);
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const iter = this.keys();
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// eslint-disable-next-line @typescript-eslint/no-unsafe-return
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return Array.from({ length: amount }, (): K => iter.next().value);
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}
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/**
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* Obtains the last value(s) in this collection.
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*
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* @param amount - Amount of values to obtain from the end
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*
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* @returns A single value if no amount is provided or an array of values, starting from the start if
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* amount is negative
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*/
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public last(): V | undefined;
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public last(amount: number): V[];
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public last(amount?: number): V | V[] | undefined {
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const arr = [...this.values()];
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if (typeof amount === 'undefined') return arr[arr.length - 1];
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if (amount < 0) return this.first(amount * -1);
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if (!amount) return [];
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return arr.slice(-amount);
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}
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/**
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* Obtains the last key(s) in this collection.
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*
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* @param amount - Amount of keys to obtain from the end
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*
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* @returns A single key if no amount is provided or an array of keys, starting from the start if
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* amount is negative
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*/
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public lastKey(): K | undefined;
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public lastKey(amount: number): K[];
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public lastKey(amount?: number): K | K[] | undefined {
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const arr = [...this.keys()];
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if (typeof amount === 'undefined') return arr[arr.length - 1];
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if (amount < 0) return this.firstKey(amount * -1);
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if (!amount) return [];
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return arr.slice(-amount);
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}
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/**
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* Identical to [Array.at()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/at).
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* Returns the item at a given index, allowing for positive and negative integers.
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* Negative integers count back from the last item in the collection.
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*
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* @param index - The index of the element to obtain
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*/
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public at(index: number) {
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index = Math.floor(index);
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const arr = [...this.values()];
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return arr.at(index);
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}
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/**
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* Identical to [Array.at()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/at).
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* Returns the key at a given index, allowing for positive and negative integers.
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* Negative integers count back from the last item in the collection.
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*
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* @param index - The index of the key to obtain
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*/
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public keyAt(index: number) {
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index = Math.floor(index);
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const arr = [...this.keys()];
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return arr.at(index);
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}
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/**
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* Obtains unique random value(s) from this collection.
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*
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* @param amount - Amount of values to obtain randomly
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*
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* @returns A single value if no amount is provided or an array of values
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*/
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public random(): V | undefined;
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public random(amount: number): V[];
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public random(amount?: number): V | V[] | undefined {
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const arr = [...this.values()];
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if (typeof amount === 'undefined') return arr[Math.floor(Math.random() * arr.length)];
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if (!arr.length || !amount) return [];
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return Array.from(
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{ length: Math.min(amount, arr.length) },
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(): V => arr.splice(Math.floor(Math.random() * arr.length), 1)[0]!,
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);
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}
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/**
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* Obtains unique random key(s) from this collection.
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*
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* @param amount - Amount of keys to obtain randomly
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*
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* @returns A single key if no amount is provided or an array
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*/
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public randomKey(): K | undefined;
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public randomKey(amount: number): K[];
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public randomKey(amount?: number): K | K[] | undefined {
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const arr = [...this.keys()];
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if (typeof amount === 'undefined') return arr[Math.floor(Math.random() * arr.length)];
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if (!arr.length || !amount) return [];
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return Array.from(
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{ length: Math.min(amount, arr.length) },
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(): K => arr.splice(Math.floor(Math.random() * arr.length), 1)[0]!,
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);
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}
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/**
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* Identical to [Array.reverse()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/reverse)
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* but returns a Collection instead of an Array.
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*/
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public reverse() {
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const entries = [...this.entries()].reverse();
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this.clear();
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for (const [key, value] of entries) this.set(key, value);
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return this;
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}
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/**
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* Searches for a single item where the given function returns a truthy value. This behaves like
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* [Array.find()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/find).
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* <warn>All collections used in Discord.js are mapped using their `id` property, and if you want to find by id you
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* should use the `get` method. See
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* [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/get) for details.</warn>
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*
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* @param fn - The function to test with (should return boolean)
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* @param thisArg - Value to use as `this` when executing function
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*
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* @example
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* collection.find(user => user.username === 'Bob');
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*/
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public find<V2 extends V>(fn: (value: V, key: K, collection: this) => value is V2): V2 | undefined;
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public find(fn: (value: V, key: K, collection: this) => boolean): V | undefined;
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public find<This, V2 extends V>(
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fn: (this: This, value: V, key: K, collection: this) => value is V2,
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thisArg: This,
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): V2 | undefined;
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public find<This>(fn: (this: This, value: V, key: K, collection: this) => boolean, thisArg: This): V | undefined;
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public find(fn: (value: V, key: K, collection: this) => boolean, thisArg?: unknown): V | undefined {
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if (typeof fn !== 'function') throw new TypeError(`${fn} is not a function`);
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if (typeof thisArg !== 'undefined') fn = fn.bind(thisArg);
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for (const [key, val] of this) {
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if (fn(val, key, this)) return val;
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}
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return undefined;
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}
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/**
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* Searches for the key of a single item where the given function returns a truthy value. This behaves like
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* [Array.findIndex()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/findIndex),
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* but returns the key rather than the positional index.
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*
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* @param fn - The function to test with (should return boolean)
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* @param thisArg - Value to use as `this` when executing function
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*
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* @example
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* collection.findKey(user => user.username === 'Bob');
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*/
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public findKey<K2 extends K>(fn: (value: V, key: K, collection: this) => key is K2): K2 | undefined;
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public findKey(fn: (value: V, key: K, collection: this) => boolean): K | undefined;
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public findKey<This, K2 extends K>(
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fn: (this: This, value: V, key: K, collection: this) => key is K2,
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thisArg: This,
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): K2 | undefined;
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public findKey<This>(fn: (this: This, value: V, key: K, collection: this) => boolean, thisArg: This): K | undefined;
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public findKey(fn: (value: V, key: K, collection: this) => boolean, thisArg?: unknown): K | undefined {
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if (typeof fn !== 'function') throw new TypeError(`${fn} is not a function`);
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if (typeof thisArg !== 'undefined') fn = fn.bind(thisArg);
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for (const [key, val] of this) {
|
||||
if (fn(val, key, this)) return key;
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||||
}
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||||
return undefined;
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||||
}
|
||||
|
||||
/**
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||||
* Removes items that satisfy the provided filter function.
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||||
*
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||||
* @param fn - Function used to test (should return a boolean)
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||||
* @param thisArg - Value to use as `this` when executing function
|
||||
*
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||||
* @returns The number of removed entries
|
||||
*/
|
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public sweep(fn: (value: V, key: K, collection: this) => boolean): number;
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||||
public sweep<T>(fn: (this: T, value: V, key: K, collection: this) => boolean, thisArg: T): number;
|
||||
public sweep(fn: (value: V, key: K, collection: this) => boolean, thisArg?: unknown): number {
|
||||
if (typeof fn !== 'function') throw new TypeError(`${fn} is not a function`);
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||||
if (typeof thisArg !== 'undefined') fn = fn.bind(thisArg);
|
||||
const previousSize = this.size;
|
||||
for (const [key, val] of this) {
|
||||
if (fn(val, key, this)) this.delete(key);
|
||||
}
|
||||
return previousSize - this.size;
|
||||
}
|
||||
|
||||
/**
|
||||
* Identical to
|
||||
* [Array.filter()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter),
|
||||
* but returns a Collection instead of an Array.
|
||||
*
|
||||
* @param fn - The function to test with (should return boolean)
|
||||
* @param thisArg - Value to use as `this` when executing function
|
||||
*
|
||||
* @example
|
||||
* collection.filter(user => user.username === 'Bob');
|
||||
*/
|
||||
public filter<K2 extends K>(fn: (value: V, key: K, collection: this) => key is K2): Collection<K2, V>;
|
||||
public filter<V2 extends V>(fn: (value: V, key: K, collection: this) => value is V2): Collection<K, V2>;
|
||||
public filter(fn: (value: V, key: K, collection: this) => boolean): Collection<K, V>;
|
||||
public filter<This, K2 extends K>(
|
||||
fn: (this: This, value: V, key: K, collection: this) => key is K2,
|
||||
thisArg: This,
|
||||
): Collection<K2, V>;
|
||||
public filter<This, V2 extends V>(
|
||||
fn: (this: This, value: V, key: K, collection: this) => value is V2,
|
||||
thisArg: This,
|
||||
): Collection<K, V2>;
|
||||
public filter<This>(fn: (this: This, value: V, key: K, collection: this) => boolean, thisArg: This): Collection<K, V>;
|
||||
public filter(fn: (value: V, key: K, collection: this) => boolean, thisArg?: unknown): Collection<K, V> {
|
||||
if (typeof fn !== 'function') throw new TypeError(`${fn} is not a function`);
|
||||
if (typeof thisArg !== 'undefined') fn = fn.bind(thisArg);
|
||||
const results = new this.constructor[Symbol.species]<K, V>();
|
||||
for (const [key, val] of this) {
|
||||
if (fn(val, key, this)) results.set(key, val);
|
||||
}
|
||||
return results;
|
||||
}
|
||||
|
||||
/**
|
||||
* Partitions the collection into two collections where the first collection
|
||||
* contains the items that passed and the second contains the items that failed.
|
||||
*
|
||||
* @param fn - Function used to test (should return a boolean)
|
||||
* @param thisArg - Value to use as `this` when executing function
|
||||
*
|
||||
* @example
|
||||
* const [big, small] = collection.partition(guild => guild.memberCount > 250);
|
||||
*/
|
||||
public partition<K2 extends K>(
|
||||
fn: (value: V, key: K, collection: this) => key is K2,
|
||||
): [Collection<K2, V>, Collection<Exclude<K, K2>, V>];
|
||||
public partition<V2 extends V>(
|
||||
fn: (value: V, key: K, collection: this) => value is V2,
|
||||
): [Collection<K, V2>, Collection<K, Exclude<V, V2>>];
|
||||
public partition(fn: (value: V, key: K, collection: this) => boolean): [Collection<K, V>, Collection<K, V>];
|
||||
public partition<This, K2 extends K>(
|
||||
fn: (this: This, value: V, key: K, collection: this) => key is K2,
|
||||
thisArg: This,
|
||||
): [Collection<K2, V>, Collection<Exclude<K, K2>, V>];
|
||||
public partition<This, V2 extends V>(
|
||||
fn: (this: This, value: V, key: K, collection: this) => value is V2,
|
||||
thisArg: This,
|
||||
): [Collection<K, V2>, Collection<K, Exclude<V, V2>>];
|
||||
public partition<This>(
|
||||
fn: (this: This, value: V, key: K, collection: this) => boolean,
|
||||
thisArg: This,
|
||||
): [Collection<K, V>, Collection<K, V>];
|
||||
public partition(
|
||||
fn: (value: V, key: K, collection: this) => boolean,
|
||||
thisArg?: unknown,
|
||||
): [Collection<K, V>, Collection<K, V>] {
|
||||
if (typeof fn !== 'function') throw new TypeError(`${fn} is not a function`);
|
||||
if (typeof thisArg !== 'undefined') fn = fn.bind(thisArg);
|
||||
const results: [Collection<K, V>, Collection<K, V>] = [
|
||||
new this.constructor[Symbol.species]<K, V>(),
|
||||
new this.constructor[Symbol.species]<K, V>(),
|
||||
];
|
||||
for (const [key, val] of this) {
|
||||
if (fn(val, key, this)) {
|
||||
results[0].set(key, val);
|
||||
} else {
|
||||
results[1].set(key, val);
|
||||
}
|
||||
}
|
||||
return results;
|
||||
}
|
||||
|
||||
/**
|
||||
* Maps each item into a Collection, then joins the results into a single Collection. Identical in behavior to
|
||||
* [Array.flatMap()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/flatMap).
|
||||
*
|
||||
* @param fn - Function that produces a new Collection
|
||||
* @param thisArg - Value to use as `this` when executing function
|
||||
*
|
||||
* @example
|
||||
* collection.flatMap(guild => guild.members.cache);
|
||||
*/
|
||||
public flatMap<T>(fn: (value: V, key: K, collection: this) => Collection<K, T>): Collection<K, T>;
|
||||
public flatMap<T, This>(
|
||||
fn: (this: This, value: V, key: K, collection: this) => Collection<K, T>,
|
||||
thisArg: This,
|
||||
): Collection<K, T>;
|
||||
public flatMap<T>(fn: (value: V, key: K, collection: this) => Collection<K, T>, thisArg?: unknown): Collection<K, T> {
|
||||
const collections = this.map(fn, thisArg);
|
||||
return new this.constructor[Symbol.species]<K, T>().concat(...collections);
|
||||
}
|
||||
|
||||
/**
|
||||
* Maps each item to another value into an array. Identical in behavior to
|
||||
* [Array.map()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map).
|
||||
*
|
||||
* @param fn - Function that produces an element of the new array, taking three arguments
|
||||
* @param thisArg - Value to use as `this` when executing function
|
||||
*
|
||||
* @example
|
||||
* collection.map(user => user.tag);
|
||||
*/
|
||||
public map<T>(fn: (value: V, key: K, collection: this) => T): T[];
|
||||
public map<This, T>(fn: (this: This, value: V, key: K, collection: this) => T, thisArg: This): T[];
|
||||
public map<T>(fn: (value: V, key: K, collection: this) => T, thisArg?: unknown): T[] {
|
||||
if (typeof fn !== 'function') throw new TypeError(`${fn} is not a function`);
|
||||
if (typeof thisArg !== 'undefined') fn = fn.bind(thisArg);
|
||||
const iter = this.entries();
|
||||
return Array.from({ length: this.size }, (): T => {
|
||||
// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
|
||||
const [key, value] = iter.next().value;
|
||||
// eslint-disable-next-line @typescript-eslint/no-unsafe-argument
|
||||
return fn(value, key, this);
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* Maps each item to another value into a collection. Identical in behavior to
|
||||
* [Array.map()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map).
|
||||
*
|
||||
* @param fn - Function that produces an element of the new collection, taking three arguments
|
||||
* @param thisArg - Value to use as `this` when executing function
|
||||
*
|
||||
* @example
|
||||
* collection.mapValues(user => user.tag);
|
||||
*/
|
||||
public mapValues<T>(fn: (value: V, key: K, collection: this) => T): Collection<K, T>;
|
||||
public mapValues<This, T>(fn: (this: This, value: V, key: K, collection: this) => T, thisArg: This): Collection<K, T>;
|
||||
public mapValues<T>(fn: (value: V, key: K, collection: this) => T, thisArg?: unknown): Collection<K, T> {
|
||||
if (typeof fn !== 'function') throw new TypeError(`${fn} is not a function`);
|
||||
if (typeof thisArg !== 'undefined') fn = fn.bind(thisArg);
|
||||
const coll = new this.constructor[Symbol.species]<K, T>();
|
||||
for (const [key, val] of this) coll.set(key, fn(val, key, this));
|
||||
return coll;
|
||||
}
|
||||
|
||||
/**
|
||||
* Checks if there exists an item that passes a test. Identical in behavior to
|
||||
* [Array.some()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/some).
|
||||
*
|
||||
* @param fn - Function used to test (should return a boolean)
|
||||
* @param thisArg - Value to use as `this` when executing function
|
||||
*
|
||||
* @example
|
||||
* collection.some(user => user.discriminator === '0000');
|
||||
*/
|
||||
public some(fn: (value: V, key: K, collection: this) => boolean): boolean;
|
||||
public some<T>(fn: (this: T, value: V, key: K, collection: this) => boolean, thisArg: T): boolean;
|
||||
public some(fn: (value: V, key: K, collection: this) => boolean, thisArg?: unknown): boolean {
|
||||
if (typeof fn !== 'function') throw new TypeError(`${fn} is not a function`);
|
||||
if (typeof thisArg !== 'undefined') fn = fn.bind(thisArg);
|
||||
for (const [key, val] of this) {
|
||||
if (fn(val, key, this)) return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* Checks if all items passes a test. Identical in behavior to
|
||||
* [Array.every()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/every).
|
||||
*
|
||||
* @param fn - Function used to test (should return a boolean)
|
||||
* @param thisArg - Value to use as `this` when executing function
|
||||
*
|
||||
* @example
|
||||
* collection.every(user => !user.bot);
|
||||
*/
|
||||
public every<K2 extends K>(fn: (value: V, key: K, collection: this) => key is K2): this is Collection<K2, V>;
|
||||
public every<V2 extends V>(fn: (value: V, key: K, collection: this) => value is V2): this is Collection<K, V2>;
|
||||
public every(fn: (value: V, key: K, collection: this) => boolean): boolean;
|
||||
public every<This, K2 extends K>(
|
||||
fn: (this: This, value: V, key: K, collection: this) => key is K2,
|
||||
thisArg: This,
|
||||
): this is Collection<K2, V>;
|
||||
public every<This, V2 extends V>(
|
||||
fn: (this: This, value: V, key: K, collection: this) => value is V2,
|
||||
thisArg: This,
|
||||
): this is Collection<K, V2>;
|
||||
public every<This>(fn: (this: This, value: V, key: K, collection: this) => boolean, thisArg: This): boolean;
|
||||
public every(fn: (value: V, key: K, collection: this) => boolean, thisArg?: unknown): boolean {
|
||||
if (typeof fn !== 'function') throw new TypeError(`${fn} is not a function`);
|
||||
if (typeof thisArg !== 'undefined') fn = fn.bind(thisArg);
|
||||
for (const [key, val] of this) {
|
||||
if (!fn(val, key, this)) return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* Applies a function to produce a single value. Identical in behavior to
|
||||
* [Array.reduce()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/reduce).
|
||||
*
|
||||
* @param fn - Function used to reduce, taking four arguments; `accumulator`, `currentValue`, `currentKey`,
|
||||
* and `collection`
|
||||
* @param initialValue - Starting value for the accumulator
|
||||
*
|
||||
* @example
|
||||
* collection.reduce((acc, guild) => acc + guild.memberCount, 0);
|
||||
*/
|
||||
public reduce<T>(fn: (accumulator: T, value: V, key: K, collection: this) => T, initialValue?: T): T {
|
||||
if (typeof fn !== 'function') throw new TypeError(`${fn} is not a function`);
|
||||
let accumulator!: T;
|
||||
|
||||
if (typeof initialValue !== 'undefined') {
|
||||
accumulator = initialValue;
|
||||
for (const [key, val] of this) accumulator = fn(accumulator, val, key, this);
|
||||
return accumulator;
|
||||
}
|
||||
let first = true;
|
||||
for (const [key, val] of this) {
|
||||
if (first) {
|
||||
accumulator = val as unknown as T;
|
||||
first = false;
|
||||
continue;
|
||||
}
|
||||
accumulator = fn(accumulator, val, key, this);
|
||||
}
|
||||
|
||||
// No items iterated.
|
||||
if (first) {
|
||||
throw new TypeError('Reduce of empty collection with no initial value');
|
||||
}
|
||||
|
||||
return accumulator;
|
||||
}
|
||||
|
||||
/**
|
||||
* Identical to
|
||||
* [Map.forEach()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/forEach),
|
||||
* but returns the collection instead of undefined.
|
||||
*
|
||||
* @param fn - Function to execute for each element
|
||||
* @param thisArg - Value to use as `this` when executing function
|
||||
*
|
||||
* @example
|
||||
* collection
|
||||
* .each(user => console.log(user.username))
|
||||
* .filter(user => user.bot)
|
||||
* .each(user => console.log(user.username));
|
||||
*/
|
||||
public each(fn: (value: V, key: K, collection: this) => void): this;
|
||||
public each<T>(fn: (this: T, value: V, key: K, collection: this) => void, thisArg: T): this;
|
||||
public each(fn: (value: V, key: K, collection: this) => void, thisArg?: unknown): this {
|
||||
if (typeof fn !== 'function') throw new TypeError(`${fn} is not a function`);
|
||||
this.forEach(fn as (value: V, key: K, map: Map<K, V>) => void, thisArg);
|
||||
return this;
|
||||
}
|
||||
|
||||
/**
|
||||
* Runs a function on the collection and returns the collection.
|
||||
*
|
||||
* @param fn - Function to execute
|
||||
* @param thisArg - Value to use as `this` when executing function
|
||||
*
|
||||
* @example
|
||||
* collection
|
||||
* .tap(coll => console.log(coll.size))
|
||||
* .filter(user => user.bot)
|
||||
* .tap(coll => console.log(coll.size))
|
||||
*/
|
||||
public tap(fn: (collection: this) => void): this;
|
||||
public tap<T>(fn: (this: T, collection: this) => void, thisArg: T): this;
|
||||
public tap(fn: (collection: this) => void, thisArg?: unknown): this {
|
||||
if (typeof fn !== 'function') throw new TypeError(`${fn} is not a function`);
|
||||
if (typeof thisArg !== 'undefined') fn = fn.bind(thisArg);
|
||||
fn(this);
|
||||
return this;
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates an identical shallow copy of this collection.
|
||||
*
|
||||
* @example
|
||||
* const newColl = someColl.clone();
|
||||
*/
|
||||
public clone(): Collection<K, V> {
|
||||
return new this.constructor[Symbol.species](this);
|
||||
}
|
||||
|
||||
/**
|
||||
* Combines this collection with others into a new collection. None of the source collections are modified.
|
||||
*
|
||||
* @param collections - Collections to merge
|
||||
*
|
||||
* @example
|
||||
* const newColl = someColl.concat(someOtherColl, anotherColl, ohBoyAColl);
|
||||
*/
|
||||
public concat(...collections: ReadonlyCollection<K, V>[]) {
|
||||
const newColl = this.clone();
|
||||
for (const coll of collections) {
|
||||
for (const [key, val] of coll) newColl.set(key, val);
|
||||
}
|
||||
return newColl;
|
||||
}
|
||||
|
||||
/**
|
||||
* Checks if this collection shares identical items with another.
|
||||
* This is different to checking for equality using equal-signs, because
|
||||
* the collections may be different objects, but contain the same data.
|
||||
*
|
||||
* @param collection - Collection to compare with
|
||||
*
|
||||
* @returns Whether the collections have identical contents
|
||||
*/
|
||||
public equals(collection: ReadonlyCollection<K, V>) {
|
||||
// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
|
||||
if (!collection) return false; // runtime check
|
||||
if (this === collection) return true;
|
||||
if (this.size !== collection.size) return false;
|
||||
for (const [key, value] of this) {
|
||||
if (!collection.has(key) || value !== collection.get(key)) {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* The sort method sorts the items of a collection in place and returns it.
|
||||
* The sort is not necessarily stable in Node 10 or older.
|
||||
* The default sort order is according to string Unicode code points.
|
||||
*
|
||||
* @param compareFunction - Specifies a function that defines the sort order.
|
||||
* If omitted, the collection is sorted according to each character's Unicode code point value, according to the string conversion of each element.
|
||||
*
|
||||
* @example
|
||||
* collection.sort((userA, userB) => userA.createdTimestamp - userB.createdTimestamp);
|
||||
*/
|
||||
public sort(compareFunction: Comparator<K, V> = Collection.defaultSort) {
|
||||
const entries = [...this.entries()];
|
||||
entries.sort((a, b): number => compareFunction(a[1], b[1], a[0], b[0]));
|
||||
|
||||
// Perform clean-up
|
||||
super.clear();
|
||||
|
||||
// Set the new entries
|
||||
for (const [k, v] of entries) {
|
||||
super.set(k, v);
|
||||
}
|
||||
return this;
|
||||
}
|
||||
|
||||
/**
|
||||
* The intersect method returns a new structure containing items where the keys and values are present in both original structures.
|
||||
*
|
||||
* @param other - The other Collection to filter against
|
||||
*/
|
||||
public intersect<T>(other: ReadonlyCollection<K, T>): Collection<K, T> {
|
||||
const coll = new this.constructor[Symbol.species]<K, T>();
|
||||
for (const [k, v] of other) {
|
||||
if (this.has(k) && Object.is(v, this.get(k))) {
|
||||
coll.set(k, v);
|
||||
}
|
||||
}
|
||||
return coll;
|
||||
}
|
||||
|
||||
/**
|
||||
* The difference method returns a new structure containing items where the key is present in one of the original structures but not the other.
|
||||
*
|
||||
* @param other - The other Collection to filter against
|
||||
*/
|
||||
public difference<T>(other: ReadonlyCollection<K, T>): Collection<K, V | T> {
|
||||
const coll = new this.constructor[Symbol.species]<K, V | T>();
|
||||
for (const [k, v] of other) {
|
||||
if (!this.has(k)) coll.set(k, v);
|
||||
}
|
||||
for (const [k, v] of this) {
|
||||
if (!other.has(k)) coll.set(k, v);
|
||||
}
|
||||
return coll;
|
||||
}
|
||||
|
||||
/**
|
||||
* Merges two Collections together into a new Collection.
|
||||
* @param other - The other Collection to merge with
|
||||
* @param whenInSelf - Function getting the result if the entry only exists in this Collection
|
||||
* @param whenInOther - Function getting the result if the entry only exists in the other Collection
|
||||
* @param whenInBoth - Function getting the result if the entry exists in both Collections
|
||||
*
|
||||
* @example
|
||||
* // Sums up the entries in two collections.
|
||||
* coll.merge(
|
||||
* other,
|
||||
* x => ({ keep: true, value: x }),
|
||||
* y => ({ keep: true, value: y }),
|
||||
* (x, y) => ({ keep: true, value: x + y }),
|
||||
* );
|
||||
*
|
||||
* @example
|
||||
* // Intersects two collections in a left-biased manner.
|
||||
* coll.merge(
|
||||
* other,
|
||||
* x => ({ keep: false }),
|
||||
* y => ({ keep: false }),
|
||||
* (x, _) => ({ keep: true, value: x }),
|
||||
* );
|
||||
*/
|
||||
public merge<T, R>(
|
||||
other: ReadonlyCollection<K, T>,
|
||||
whenInSelf: (value: V, key: K) => Keep<R>,
|
||||
whenInOther: (valueOther: T, key: K) => Keep<R>,
|
||||
whenInBoth: (value: V, valueOther: T, key: K) => Keep<R>,
|
||||
): Collection<K, R> {
|
||||
const coll = new this.constructor[Symbol.species]<K, R>();
|
||||
const keys = new Set([...this.keys(), ...other.keys()]);
|
||||
for (const k of keys) {
|
||||
const hasInSelf = this.has(k);
|
||||
const hasInOther = other.has(k);
|
||||
|
||||
if (hasInSelf && hasInOther) {
|
||||
const r = whenInBoth(this.get(k)!, other.get(k)!, k);
|
||||
if (r.keep) coll.set(k, r.value);
|
||||
} else if (hasInSelf) {
|
||||
const r = whenInSelf(this.get(k)!, k);
|
||||
if (r.keep) coll.set(k, r.value);
|
||||
} else if (hasInOther) {
|
||||
const r = whenInOther(other.get(k)!, k);
|
||||
if (r.keep) coll.set(k, r.value);
|
||||
}
|
||||
}
|
||||
return coll;
|
||||
}
|
||||
|
||||
/**
|
||||
* The sorted method sorts the items of a collection and returns it.
|
||||
* The sort is not necessarily stable in Node 10 or older.
|
||||
* The default sort order is according to string Unicode code points.
|
||||
*
|
||||
* @param compareFunction - Specifies a function that defines the sort order.
|
||||
* If omitted, the collection is sorted according to each character's Unicode code point value,
|
||||
* according to the string conversion of each element.
|
||||
*
|
||||
* @example
|
||||
* collection.sorted((userA, userB) => userA.createdTimestamp - userB.createdTimestamp);
|
||||
*/
|
||||
public sorted(compareFunction: Comparator<K, V> = Collection.defaultSort) {
|
||||
return new this.constructor[Symbol.species](this).sort((av, bv, ak, bk) => compareFunction(av, bv, ak, bk));
|
||||
}
|
||||
|
||||
public toJSON() {
|
||||
// toJSON is called recursively by JSON.stringify.
|
||||
return [...this.values()];
|
||||
}
|
||||
|
||||
private static defaultSort<V>(firstValue: V, secondValue: V): number {
|
||||
return Number(firstValue > secondValue) || Number(firstValue === secondValue) - 1;
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates a Collection from a list of entries.
|
||||
*
|
||||
* @param entries - The list of entries
|
||||
* @param combine - Function to combine an existing entry with a new one
|
||||
*
|
||||
* @example
|
||||
* Collection.combineEntries([["a", 1], ["b", 2], ["a", 2]], (x, y) => x + y);
|
||||
* // returns Collection { "a" => 3, "b" => 2 }
|
||||
*/
|
||||
public static combineEntries<K, V>(
|
||||
entries: Iterable<[K, V]>,
|
||||
combine: (firstValue: V, secondValue: V, key: K) => V,
|
||||
): Collection<K, V> {
|
||||
const coll = new Collection<K, V>();
|
||||
for (const [k, v] of entries) {
|
||||
if (coll.has(k)) {
|
||||
coll.set(k, combine(coll.get(k)!, v, k));
|
||||
} else {
|
||||
coll.set(k, v);
|
||||
}
|
||||
}
|
||||
return coll;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @internal
|
||||
*/
|
||||
export type Keep<V> = { keep: true; value: V } | { keep: false };
|
||||
|
||||
/**
|
||||
* @internal
|
||||
*/
|
||||
export type Comparator<K, V> = (firstValue: V, secondValue: V, firstKey: K, secondKey: K) => number;
|
||||
@@ -1,791 +1 @@
|
||||
/* eslint-disable @typescript-eslint/restrict-template-expressions */
|
||||
/**
|
||||
* @internal
|
||||
*/
|
||||
export interface CollectionConstructor {
|
||||
new (): Collection<unknown, unknown>;
|
||||
new <K, V>(entries?: ReadonlyArray<readonly [K, V]> | null): Collection<K, V>;
|
||||
new <K, V>(iterable: Iterable<readonly [K, V]>): Collection<K, V>;
|
||||
readonly prototype: Collection<unknown, unknown>;
|
||||
readonly [Symbol.species]: CollectionConstructor;
|
||||
}
|
||||
|
||||
/**
|
||||
* Represents an immutable version of a collection
|
||||
*/
|
||||
export type ReadonlyCollection<K, V> = ReadonlyMap<K, V> &
|
||||
Omit<Collection<K, V>, 'forEach' | 'ensure' | 'reverse' | 'sweep' | 'sort' | 'get' | 'set' | 'delete'>;
|
||||
|
||||
/**
|
||||
* Separate interface for the constructor so that emitted js does not have a constructor that overwrites itself
|
||||
*
|
||||
* @internal
|
||||
*/
|
||||
export interface Collection<K, V> extends Map<K, V> {
|
||||
constructor: CollectionConstructor;
|
||||
}
|
||||
|
||||
/**
|
||||
* A Map with additional utility methods. This is used throughout discord.js rather than Arrays for anything that has
|
||||
* an ID, for significantly improved performance and ease-of-use.
|
||||
*/
|
||||
export class Collection<K, V> extends Map<K, V> {
|
||||
/**
|
||||
* Obtains the value of the given key if it exists, otherwise sets and returns the value provided by the default value generator.
|
||||
*
|
||||
* @param key - The key to get if it exists, or set otherwise
|
||||
* @param defaultValueGenerator - A function that generates the default value
|
||||
*
|
||||
* @example
|
||||
* collection.ensure(guildId, () => defaultGuildConfig);
|
||||
*/
|
||||
public ensure(key: K, defaultValueGenerator: (key: K, collection: this) => V): V {
|
||||
if (this.has(key)) return this.get(key)!;
|
||||
if (typeof defaultValueGenerator !== 'function') throw new TypeError(`${defaultValueGenerator} is not a function`);
|
||||
const defaultValue = defaultValueGenerator(key, this);
|
||||
this.set(key, defaultValue);
|
||||
return defaultValue;
|
||||
}
|
||||
|
||||
/**
|
||||
* Checks if all of the elements exist in the collection.
|
||||
*
|
||||
* @param keys - The keys of the elements to check for
|
||||
*
|
||||
* @returns `true` if all of the elements exist, `false` if at least one does not exist.
|
||||
*/
|
||||
public hasAll(...keys: K[]) {
|
||||
return keys.every((k) => super.has(k));
|
||||
}
|
||||
|
||||
/**
|
||||
* Checks if any of the elements exist in the collection.
|
||||
*
|
||||
* @param keys - The keys of the elements to check for
|
||||
*
|
||||
* @returns `true` if any of the elements exist, `false` if none exist.
|
||||
*/
|
||||
public hasAny(...keys: K[]) {
|
||||
return keys.some((k) => super.has(k));
|
||||
}
|
||||
|
||||
/**
|
||||
* Obtains the first value(s) in this collection.
|
||||
*
|
||||
* @param amount - Amount of values to obtain from the beginning
|
||||
*
|
||||
* @returns A single value if no amount is provided or an array of values, starting from the end if amount is negative
|
||||
*/
|
||||
public first(): V | undefined;
|
||||
public first(amount: number): V[];
|
||||
public first(amount?: number): V | V[] | undefined {
|
||||
// eslint-disable-next-line @typescript-eslint/no-unsafe-return
|
||||
if (typeof amount === 'undefined') return this.values().next().value;
|
||||
if (amount < 0) return this.last(amount * -1);
|
||||
amount = Math.min(this.size, amount);
|
||||
const iter = this.values();
|
||||
// eslint-disable-next-line @typescript-eslint/no-unsafe-return
|
||||
return Array.from({ length: amount }, (): V => iter.next().value);
|
||||
}
|
||||
|
||||
/**
|
||||
* Obtains the first key(s) in this collection.
|
||||
*
|
||||
* @param amount - Amount of keys to obtain from the beginning
|
||||
*
|
||||
* @returns A single key if no amount is provided or an array of keys, starting from the end if
|
||||
* amount is negative
|
||||
*/
|
||||
public firstKey(): K | undefined;
|
||||
public firstKey(amount: number): K[];
|
||||
public firstKey(amount?: number): K | K[] | undefined {
|
||||
// eslint-disable-next-line @typescript-eslint/no-unsafe-return
|
||||
if (typeof amount === 'undefined') return this.keys().next().value;
|
||||
if (amount < 0) return this.lastKey(amount * -1);
|
||||
amount = Math.min(this.size, amount);
|
||||
const iter = this.keys();
|
||||
// eslint-disable-next-line @typescript-eslint/no-unsafe-return
|
||||
return Array.from({ length: amount }, (): K => iter.next().value);
|
||||
}
|
||||
|
||||
/**
|
||||
* Obtains the last value(s) in this collection.
|
||||
*
|
||||
* @param amount - Amount of values to obtain from the end
|
||||
*
|
||||
* @returns A single value if no amount is provided or an array of values, starting from the start if
|
||||
* amount is negative
|
||||
*/
|
||||
public last(): V | undefined;
|
||||
public last(amount: number): V[];
|
||||
public last(amount?: number): V | V[] | undefined {
|
||||
const arr = [...this.values()];
|
||||
if (typeof amount === 'undefined') return arr[arr.length - 1];
|
||||
if (amount < 0) return this.first(amount * -1);
|
||||
if (!amount) return [];
|
||||
return arr.slice(-amount);
|
||||
}
|
||||
|
||||
/**
|
||||
* Obtains the last key(s) in this collection.
|
||||
*
|
||||
* @param amount - Amount of keys to obtain from the end
|
||||
*
|
||||
* @returns A single key if no amount is provided or an array of keys, starting from the start if
|
||||
* amount is negative
|
||||
*/
|
||||
public lastKey(): K | undefined;
|
||||
public lastKey(amount: number): K[];
|
||||
public lastKey(amount?: number): K | K[] | undefined {
|
||||
const arr = [...this.keys()];
|
||||
if (typeof amount === 'undefined') return arr[arr.length - 1];
|
||||
if (amount < 0) return this.firstKey(amount * -1);
|
||||
if (!amount) return [];
|
||||
return arr.slice(-amount);
|
||||
}
|
||||
|
||||
/**
|
||||
* Identical to [Array.at()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/at).
|
||||
* Returns the item at a given index, allowing for positive and negative integers.
|
||||
* Negative integers count back from the last item in the collection.
|
||||
*
|
||||
* @param index - The index of the element to obtain
|
||||
*/
|
||||
public at(index: number) {
|
||||
index = Math.floor(index);
|
||||
const arr = [...this.values()];
|
||||
return arr.at(index);
|
||||
}
|
||||
|
||||
/**
|
||||
* Identical to [Array.at()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/at).
|
||||
* Returns the key at a given index, allowing for positive and negative integers.
|
||||
* Negative integers count back from the last item in the collection.
|
||||
*
|
||||
* @param index - The index of the key to obtain
|
||||
*/
|
||||
public keyAt(index: number) {
|
||||
index = Math.floor(index);
|
||||
const arr = [...this.keys()];
|
||||
return arr.at(index);
|
||||
}
|
||||
|
||||
/**
|
||||
* Obtains unique random value(s) from this collection.
|
||||
*
|
||||
* @param amount - Amount of values to obtain randomly
|
||||
*
|
||||
* @returns A single value if no amount is provided or an array of values
|
||||
*/
|
||||
public random(): V | undefined;
|
||||
public random(amount: number): V[];
|
||||
public random(amount?: number): V | V[] | undefined {
|
||||
const arr = [...this.values()];
|
||||
if (typeof amount === 'undefined') return arr[Math.floor(Math.random() * arr.length)];
|
||||
if (!arr.length || !amount) return [];
|
||||
return Array.from(
|
||||
{ length: Math.min(amount, arr.length) },
|
||||
(): V => arr.splice(Math.floor(Math.random() * arr.length), 1)[0]!,
|
||||
);
|
||||
}
|
||||
|
||||
/**
|
||||
* Obtains unique random key(s) from this collection.
|
||||
*
|
||||
* @param amount - Amount of keys to obtain randomly
|
||||
*
|
||||
* @returns A single key if no amount is provided or an array
|
||||
*/
|
||||
public randomKey(): K | undefined;
|
||||
public randomKey(amount: number): K[];
|
||||
public randomKey(amount?: number): K | K[] | undefined {
|
||||
const arr = [...this.keys()];
|
||||
if (typeof amount === 'undefined') return arr[Math.floor(Math.random() * arr.length)];
|
||||
if (!arr.length || !amount) return [];
|
||||
return Array.from(
|
||||
{ length: Math.min(amount, arr.length) },
|
||||
(): K => arr.splice(Math.floor(Math.random() * arr.length), 1)[0]!,
|
||||
);
|
||||
}
|
||||
|
||||
/**
|
||||
* Identical to [Array.reverse()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/reverse)
|
||||
* but returns a Collection instead of an Array.
|
||||
*/
|
||||
public reverse() {
|
||||
const entries = [...this.entries()].reverse();
|
||||
this.clear();
|
||||
for (const [key, value] of entries) this.set(key, value);
|
||||
return this;
|
||||
}
|
||||
|
||||
/**
|
||||
* Searches for a single item where the given function returns a truthy value. This behaves like
|
||||
* [Array.find()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/find).
|
||||
* <warn>All collections used in Discord.js are mapped using their `id` property, and if you want to find by id you
|
||||
* should use the `get` method. See
|
||||
* [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/get) for details.</warn>
|
||||
*
|
||||
* @param fn - The function to test with (should return boolean)
|
||||
* @param thisArg - Value to use as `this` when executing function
|
||||
*
|
||||
* @example
|
||||
* collection.find(user => user.username === 'Bob');
|
||||
*/
|
||||
public find<V2 extends V>(fn: (value: V, key: K, collection: this) => value is V2): V2 | undefined;
|
||||
public find(fn: (value: V, key: K, collection: this) => boolean): V | undefined;
|
||||
public find<This, V2 extends V>(
|
||||
fn: (this: This, value: V, key: K, collection: this) => value is V2,
|
||||
thisArg: This,
|
||||
): V2 | undefined;
|
||||
public find<This>(fn: (this: This, value: V, key: K, collection: this) => boolean, thisArg: This): V | undefined;
|
||||
public find(fn: (value: V, key: K, collection: this) => boolean, thisArg?: unknown): V | undefined {
|
||||
if (typeof fn !== 'function') throw new TypeError(`${fn} is not a function`);
|
||||
if (typeof thisArg !== 'undefined') fn = fn.bind(thisArg);
|
||||
for (const [key, val] of this) {
|
||||
if (fn(val, key, this)) return val;
|
||||
}
|
||||
return undefined;
|
||||
}
|
||||
|
||||
/**
|
||||
* Searches for the key of a single item where the given function returns a truthy value. This behaves like
|
||||
* [Array.findIndex()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/findIndex),
|
||||
* but returns the key rather than the positional index.
|
||||
*
|
||||
* @param fn - The function to test with (should return boolean)
|
||||
* @param thisArg - Value to use as `this` when executing function
|
||||
*
|
||||
* @example
|
||||
* collection.findKey(user => user.username === 'Bob');
|
||||
*/
|
||||
public findKey<K2 extends K>(fn: (value: V, key: K, collection: this) => key is K2): K2 | undefined;
|
||||
public findKey(fn: (value: V, key: K, collection: this) => boolean): K | undefined;
|
||||
public findKey<This, K2 extends K>(
|
||||
fn: (this: This, value: V, key: K, collection: this) => key is K2,
|
||||
thisArg: This,
|
||||
): K2 | undefined;
|
||||
public findKey<This>(fn: (this: This, value: V, key: K, collection: this) => boolean, thisArg: This): K | undefined;
|
||||
public findKey(fn: (value: V, key: K, collection: this) => boolean, thisArg?: unknown): K | undefined {
|
||||
if (typeof fn !== 'function') throw new TypeError(`${fn} is not a function`);
|
||||
if (typeof thisArg !== 'undefined') fn = fn.bind(thisArg);
|
||||
for (const [key, val] of this) {
|
||||
if (fn(val, key, this)) return key;
|
||||
}
|
||||
return undefined;
|
||||
}
|
||||
|
||||
/**
|
||||
* Removes items that satisfy the provided filter function.
|
||||
*
|
||||
* @param fn - Function used to test (should return a boolean)
|
||||
* @param thisArg - Value to use as `this` when executing function
|
||||
*
|
||||
* @returns The number of removed entries
|
||||
*/
|
||||
public sweep(fn: (value: V, key: K, collection: this) => boolean): number;
|
||||
public sweep<T>(fn: (this: T, value: V, key: K, collection: this) => boolean, thisArg: T): number;
|
||||
public sweep(fn: (value: V, key: K, collection: this) => boolean, thisArg?: unknown): number {
|
||||
if (typeof fn !== 'function') throw new TypeError(`${fn} is not a function`);
|
||||
if (typeof thisArg !== 'undefined') fn = fn.bind(thisArg);
|
||||
const previousSize = this.size;
|
||||
for (const [key, val] of this) {
|
||||
if (fn(val, key, this)) this.delete(key);
|
||||
}
|
||||
return previousSize - this.size;
|
||||
}
|
||||
|
||||
/**
|
||||
* Identical to
|
||||
* [Array.filter()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter),
|
||||
* but returns a Collection instead of an Array.
|
||||
*
|
||||
* @param fn - The function to test with (should return boolean)
|
||||
* @param thisArg - Value to use as `this` when executing function
|
||||
*
|
||||
* @example
|
||||
* collection.filter(user => user.username === 'Bob');
|
||||
*/
|
||||
public filter<K2 extends K>(fn: (value: V, key: K, collection: this) => key is K2): Collection<K2, V>;
|
||||
public filter<V2 extends V>(fn: (value: V, key: K, collection: this) => value is V2): Collection<K, V2>;
|
||||
public filter(fn: (value: V, key: K, collection: this) => boolean): Collection<K, V>;
|
||||
public filter<This, K2 extends K>(
|
||||
fn: (this: This, value: V, key: K, collection: this) => key is K2,
|
||||
thisArg: This,
|
||||
): Collection<K2, V>;
|
||||
public filter<This, V2 extends V>(
|
||||
fn: (this: This, value: V, key: K, collection: this) => value is V2,
|
||||
thisArg: This,
|
||||
): Collection<K, V2>;
|
||||
public filter<This>(fn: (this: This, value: V, key: K, collection: this) => boolean, thisArg: This): Collection<K, V>;
|
||||
public filter(fn: (value: V, key: K, collection: this) => boolean, thisArg?: unknown): Collection<K, V> {
|
||||
if (typeof fn !== 'function') throw new TypeError(`${fn} is not a function`);
|
||||
if (typeof thisArg !== 'undefined') fn = fn.bind(thisArg);
|
||||
const results = new this.constructor[Symbol.species]<K, V>();
|
||||
for (const [key, val] of this) {
|
||||
if (fn(val, key, this)) results.set(key, val);
|
||||
}
|
||||
return results;
|
||||
}
|
||||
|
||||
/**
|
||||
* Partitions the collection into two collections where the first collection
|
||||
* contains the items that passed and the second contains the items that failed.
|
||||
*
|
||||
* @param fn - Function used to test (should return a boolean)
|
||||
* @param thisArg - Value to use as `this` when executing function
|
||||
*
|
||||
* @example
|
||||
* const [big, small] = collection.partition(guild => guild.memberCount > 250);
|
||||
*/
|
||||
public partition<K2 extends K>(
|
||||
fn: (value: V, key: K, collection: this) => key is K2,
|
||||
): [Collection<K2, V>, Collection<Exclude<K, K2>, V>];
|
||||
public partition<V2 extends V>(
|
||||
fn: (value: V, key: K, collection: this) => value is V2,
|
||||
): [Collection<K, V2>, Collection<K, Exclude<V, V2>>];
|
||||
public partition(fn: (value: V, key: K, collection: this) => boolean): [Collection<K, V>, Collection<K, V>];
|
||||
public partition<This, K2 extends K>(
|
||||
fn: (this: This, value: V, key: K, collection: this) => key is K2,
|
||||
thisArg: This,
|
||||
): [Collection<K2, V>, Collection<Exclude<K, K2>, V>];
|
||||
public partition<This, V2 extends V>(
|
||||
fn: (this: This, value: V, key: K, collection: this) => value is V2,
|
||||
thisArg: This,
|
||||
): [Collection<K, V2>, Collection<K, Exclude<V, V2>>];
|
||||
public partition<This>(
|
||||
fn: (this: This, value: V, key: K, collection: this) => boolean,
|
||||
thisArg: This,
|
||||
): [Collection<K, V>, Collection<K, V>];
|
||||
public partition(
|
||||
fn: (value: V, key: K, collection: this) => boolean,
|
||||
thisArg?: unknown,
|
||||
): [Collection<K, V>, Collection<K, V>] {
|
||||
if (typeof fn !== 'function') throw new TypeError(`${fn} is not a function`);
|
||||
if (typeof thisArg !== 'undefined') fn = fn.bind(thisArg);
|
||||
const results: [Collection<K, V>, Collection<K, V>] = [
|
||||
new this.constructor[Symbol.species]<K, V>(),
|
||||
new this.constructor[Symbol.species]<K, V>(),
|
||||
];
|
||||
for (const [key, val] of this) {
|
||||
if (fn(val, key, this)) {
|
||||
results[0].set(key, val);
|
||||
} else {
|
||||
results[1].set(key, val);
|
||||
}
|
||||
}
|
||||
return results;
|
||||
}
|
||||
|
||||
/**
|
||||
* Maps each item into a Collection, then joins the results into a single Collection. Identical in behavior to
|
||||
* [Array.flatMap()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/flatMap).
|
||||
*
|
||||
* @param fn - Function that produces a new Collection
|
||||
* @param thisArg - Value to use as `this` when executing function
|
||||
*
|
||||
* @example
|
||||
* collection.flatMap(guild => guild.members.cache);
|
||||
*/
|
||||
public flatMap<T>(fn: (value: V, key: K, collection: this) => Collection<K, T>): Collection<K, T>;
|
||||
public flatMap<T, This>(
|
||||
fn: (this: This, value: V, key: K, collection: this) => Collection<K, T>,
|
||||
thisArg: This,
|
||||
): Collection<K, T>;
|
||||
public flatMap<T>(fn: (value: V, key: K, collection: this) => Collection<K, T>, thisArg?: unknown): Collection<K, T> {
|
||||
const collections = this.map(fn, thisArg);
|
||||
return new this.constructor[Symbol.species]<K, T>().concat(...collections);
|
||||
}
|
||||
|
||||
/**
|
||||
* Maps each item to another value into an array. Identical in behavior to
|
||||
* [Array.map()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map).
|
||||
*
|
||||
* @param fn - Function that produces an element of the new array, taking three arguments
|
||||
* @param thisArg - Value to use as `this` when executing function
|
||||
*
|
||||
* @example
|
||||
* collection.map(user => user.tag);
|
||||
*/
|
||||
public map<T>(fn: (value: V, key: K, collection: this) => T): T[];
|
||||
public map<This, T>(fn: (this: This, value: V, key: K, collection: this) => T, thisArg: This): T[];
|
||||
public map<T>(fn: (value: V, key: K, collection: this) => T, thisArg?: unknown): T[] {
|
||||
if (typeof fn !== 'function') throw new TypeError(`${fn} is not a function`);
|
||||
if (typeof thisArg !== 'undefined') fn = fn.bind(thisArg);
|
||||
const iter = this.entries();
|
||||
return Array.from({ length: this.size }, (): T => {
|
||||
// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
|
||||
const [key, value] = iter.next().value;
|
||||
// eslint-disable-next-line @typescript-eslint/no-unsafe-argument
|
||||
return fn(value, key, this);
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* Maps each item to another value into a collection. Identical in behavior to
|
||||
* [Array.map()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map).
|
||||
*
|
||||
* @param fn - Function that produces an element of the new collection, taking three arguments
|
||||
* @param thisArg - Value to use as `this` when executing function
|
||||
*
|
||||
* @example
|
||||
* collection.mapValues(user => user.tag);
|
||||
*/
|
||||
public mapValues<T>(fn: (value: V, key: K, collection: this) => T): Collection<K, T>;
|
||||
public mapValues<This, T>(fn: (this: This, value: V, key: K, collection: this) => T, thisArg: This): Collection<K, T>;
|
||||
public mapValues<T>(fn: (value: V, key: K, collection: this) => T, thisArg?: unknown): Collection<K, T> {
|
||||
if (typeof fn !== 'function') throw new TypeError(`${fn} is not a function`);
|
||||
if (typeof thisArg !== 'undefined') fn = fn.bind(thisArg);
|
||||
const coll = new this.constructor[Symbol.species]<K, T>();
|
||||
for (const [key, val] of this) coll.set(key, fn(val, key, this));
|
||||
return coll;
|
||||
}
|
||||
|
||||
/**
|
||||
* Checks if there exists an item that passes a test. Identical in behavior to
|
||||
* [Array.some()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/some).
|
||||
*
|
||||
* @param fn - Function used to test (should return a boolean)
|
||||
* @param thisArg - Value to use as `this` when executing function
|
||||
*
|
||||
* @example
|
||||
* collection.some(user => user.discriminator === '0000');
|
||||
*/
|
||||
public some(fn: (value: V, key: K, collection: this) => boolean): boolean;
|
||||
public some<T>(fn: (this: T, value: V, key: K, collection: this) => boolean, thisArg: T): boolean;
|
||||
public some(fn: (value: V, key: K, collection: this) => boolean, thisArg?: unknown): boolean {
|
||||
if (typeof fn !== 'function') throw new TypeError(`${fn} is not a function`);
|
||||
if (typeof thisArg !== 'undefined') fn = fn.bind(thisArg);
|
||||
for (const [key, val] of this) {
|
||||
if (fn(val, key, this)) return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* Checks if all items passes a test. Identical in behavior to
|
||||
* [Array.every()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/every).
|
||||
*
|
||||
* @param fn - Function used to test (should return a boolean)
|
||||
* @param thisArg - Value to use as `this` when executing function
|
||||
*
|
||||
* @example
|
||||
* collection.every(user => !user.bot);
|
||||
*/
|
||||
public every<K2 extends K>(fn: (value: V, key: K, collection: this) => key is K2): this is Collection<K2, V>;
|
||||
public every<V2 extends V>(fn: (value: V, key: K, collection: this) => value is V2): this is Collection<K, V2>;
|
||||
public every(fn: (value: V, key: K, collection: this) => boolean): boolean;
|
||||
public every<This, K2 extends K>(
|
||||
fn: (this: This, value: V, key: K, collection: this) => key is K2,
|
||||
thisArg: This,
|
||||
): this is Collection<K2, V>;
|
||||
public every<This, V2 extends V>(
|
||||
fn: (this: This, value: V, key: K, collection: this) => value is V2,
|
||||
thisArg: This,
|
||||
): this is Collection<K, V2>;
|
||||
public every<This>(fn: (this: This, value: V, key: K, collection: this) => boolean, thisArg: This): boolean;
|
||||
public every(fn: (value: V, key: K, collection: this) => boolean, thisArg?: unknown): boolean {
|
||||
if (typeof fn !== 'function') throw new TypeError(`${fn} is not a function`);
|
||||
if (typeof thisArg !== 'undefined') fn = fn.bind(thisArg);
|
||||
for (const [key, val] of this) {
|
||||
if (!fn(val, key, this)) return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* Applies a function to produce a single value. Identical in behavior to
|
||||
* [Array.reduce()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/reduce).
|
||||
*
|
||||
* @param fn - Function used to reduce, taking four arguments; `accumulator`, `currentValue`, `currentKey`,
|
||||
* and `collection`
|
||||
* @param initialValue - Starting value for the accumulator
|
||||
*
|
||||
* @example
|
||||
* collection.reduce((acc, guild) => acc + guild.memberCount, 0);
|
||||
*/
|
||||
public reduce<T>(fn: (accumulator: T, value: V, key: K, collection: this) => T, initialValue?: T): T {
|
||||
if (typeof fn !== 'function') throw new TypeError(`${fn} is not a function`);
|
||||
let accumulator!: T;
|
||||
|
||||
if (typeof initialValue !== 'undefined') {
|
||||
accumulator = initialValue;
|
||||
for (const [key, val] of this) accumulator = fn(accumulator, val, key, this);
|
||||
return accumulator;
|
||||
}
|
||||
let first = true;
|
||||
for (const [key, val] of this) {
|
||||
if (first) {
|
||||
accumulator = val as unknown as T;
|
||||
first = false;
|
||||
continue;
|
||||
}
|
||||
accumulator = fn(accumulator, val, key, this);
|
||||
}
|
||||
|
||||
// No items iterated.
|
||||
if (first) {
|
||||
throw new TypeError('Reduce of empty collection with no initial value');
|
||||
}
|
||||
|
||||
return accumulator;
|
||||
}
|
||||
|
||||
/**
|
||||
* Identical to
|
||||
* [Map.forEach()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/forEach),
|
||||
* but returns the collection instead of undefined.
|
||||
*
|
||||
* @param fn - Function to execute for each element
|
||||
* @param thisArg - Value to use as `this` when executing function
|
||||
*
|
||||
* @example
|
||||
* collection
|
||||
* .each(user => console.log(user.username))
|
||||
* .filter(user => user.bot)
|
||||
* .each(user => console.log(user.username));
|
||||
*/
|
||||
public each(fn: (value: V, key: K, collection: this) => void): this;
|
||||
public each<T>(fn: (this: T, value: V, key: K, collection: this) => void, thisArg: T): this;
|
||||
public each(fn: (value: V, key: K, collection: this) => void, thisArg?: unknown): this {
|
||||
if (typeof fn !== 'function') throw new TypeError(`${fn} is not a function`);
|
||||
this.forEach(fn as (value: V, key: K, map: Map<K, V>) => void, thisArg);
|
||||
return this;
|
||||
}
|
||||
|
||||
/**
|
||||
* Runs a function on the collection and returns the collection.
|
||||
*
|
||||
* @param fn - Function to execute
|
||||
* @param thisArg - Value to use as `this` when executing function
|
||||
*
|
||||
* @example
|
||||
* collection
|
||||
* .tap(coll => console.log(coll.size))
|
||||
* .filter(user => user.bot)
|
||||
* .tap(coll => console.log(coll.size))
|
||||
*/
|
||||
public tap(fn: (collection: this) => void): this;
|
||||
public tap<T>(fn: (this: T, collection: this) => void, thisArg: T): this;
|
||||
public tap(fn: (collection: this) => void, thisArg?: unknown): this {
|
||||
if (typeof fn !== 'function') throw new TypeError(`${fn} is not a function`);
|
||||
if (typeof thisArg !== 'undefined') fn = fn.bind(thisArg);
|
||||
fn(this);
|
||||
return this;
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates an identical shallow copy of this collection.
|
||||
*
|
||||
* @example
|
||||
* const newColl = someColl.clone();
|
||||
*/
|
||||
public clone(): Collection<K, V> {
|
||||
return new this.constructor[Symbol.species](this);
|
||||
}
|
||||
|
||||
/**
|
||||
* Combines this collection with others into a new collection. None of the source collections are modified.
|
||||
*
|
||||
* @param collections - Collections to merge
|
||||
*
|
||||
* @example
|
||||
* const newColl = someColl.concat(someOtherColl, anotherColl, ohBoyAColl);
|
||||
*/
|
||||
public concat(...collections: ReadonlyCollection<K, V>[]) {
|
||||
const newColl = this.clone();
|
||||
for (const coll of collections) {
|
||||
for (const [key, val] of coll) newColl.set(key, val);
|
||||
}
|
||||
return newColl;
|
||||
}
|
||||
|
||||
/**
|
||||
* Checks if this collection shares identical items with another.
|
||||
* This is different to checking for equality using equal-signs, because
|
||||
* the collections may be different objects, but contain the same data.
|
||||
*
|
||||
* @param collection - Collection to compare with
|
||||
*
|
||||
* @returns Whether the collections have identical contents
|
||||
*/
|
||||
public equals(collection: ReadonlyCollection<K, V>) {
|
||||
// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
|
||||
if (!collection) return false; // runtime check
|
||||
if (this === collection) return true;
|
||||
if (this.size !== collection.size) return false;
|
||||
for (const [key, value] of this) {
|
||||
if (!collection.has(key) || value !== collection.get(key)) {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* The sort method sorts the items of a collection in place and returns it.
|
||||
* The sort is not necessarily stable in Node 10 or older.
|
||||
* The default sort order is according to string Unicode code points.
|
||||
*
|
||||
* @param compareFunction - Specifies a function that defines the sort order.
|
||||
* If omitted, the collection is sorted according to each character's Unicode code point value, according to the string conversion of each element.
|
||||
*
|
||||
* @example
|
||||
* collection.sort((userA, userB) => userA.createdTimestamp - userB.createdTimestamp);
|
||||
*/
|
||||
public sort(compareFunction: Comparator<K, V> = Collection.defaultSort) {
|
||||
const entries = [...this.entries()];
|
||||
entries.sort((a, b): number => compareFunction(a[1], b[1], a[0], b[0]));
|
||||
|
||||
// Perform clean-up
|
||||
super.clear();
|
||||
|
||||
// Set the new entries
|
||||
for (const [k, v] of entries) {
|
||||
super.set(k, v);
|
||||
}
|
||||
return this;
|
||||
}
|
||||
|
||||
/**
|
||||
* The intersect method returns a new structure containing items where the keys and values are present in both original structures.
|
||||
*
|
||||
* @param other - The other Collection to filter against
|
||||
*/
|
||||
public intersect<T>(other: ReadonlyCollection<K, T>): Collection<K, T> {
|
||||
const coll = new this.constructor[Symbol.species]<K, T>();
|
||||
for (const [k, v] of other) {
|
||||
if (this.has(k) && Object.is(v, this.get(k))) {
|
||||
coll.set(k, v);
|
||||
}
|
||||
}
|
||||
return coll;
|
||||
}
|
||||
|
||||
/**
|
||||
* The difference method returns a new structure containing items where the key is present in one of the original structures but not the other.
|
||||
*
|
||||
* @param other - The other Collection to filter against
|
||||
*/
|
||||
public difference<T>(other: ReadonlyCollection<K, T>): Collection<K, V | T> {
|
||||
const coll = new this.constructor[Symbol.species]<K, V | T>();
|
||||
for (const [k, v] of other) {
|
||||
if (!this.has(k)) coll.set(k, v);
|
||||
}
|
||||
for (const [k, v] of this) {
|
||||
if (!other.has(k)) coll.set(k, v);
|
||||
}
|
||||
return coll;
|
||||
}
|
||||
|
||||
/**
|
||||
* Merges two Collections together into a new Collection.
|
||||
* @param other - The other Collection to merge with
|
||||
* @param whenInSelf - Function getting the result if the entry only exists in this Collection
|
||||
* @param whenInOther - Function getting the result if the entry only exists in the other Collection
|
||||
* @param whenInBoth - Function getting the result if the entry exists in both Collections
|
||||
*
|
||||
* @example
|
||||
* // Sums up the entries in two collections.
|
||||
* coll.merge(
|
||||
* other,
|
||||
* x => ({ keep: true, value: x }),
|
||||
* y => ({ keep: true, value: y }),
|
||||
* (x, y) => ({ keep: true, value: x + y }),
|
||||
* );
|
||||
*
|
||||
* @example
|
||||
* // Intersects two collections in a left-biased manner.
|
||||
* coll.merge(
|
||||
* other,
|
||||
* x => ({ keep: false }),
|
||||
* y => ({ keep: false }),
|
||||
* (x, _) => ({ keep: true, value: x }),
|
||||
* );
|
||||
*/
|
||||
public merge<T, R>(
|
||||
other: ReadonlyCollection<K, T>,
|
||||
whenInSelf: (value: V, key: K) => Keep<R>,
|
||||
whenInOther: (valueOther: T, key: K) => Keep<R>,
|
||||
whenInBoth: (value: V, valueOther: T, key: K) => Keep<R>,
|
||||
): Collection<K, R> {
|
||||
const coll = new this.constructor[Symbol.species]<K, R>();
|
||||
const keys = new Set([...this.keys(), ...other.keys()]);
|
||||
for (const k of keys) {
|
||||
const hasInSelf = this.has(k);
|
||||
const hasInOther = other.has(k);
|
||||
|
||||
if (hasInSelf && hasInOther) {
|
||||
const r = whenInBoth(this.get(k)!, other.get(k)!, k);
|
||||
if (r.keep) coll.set(k, r.value);
|
||||
} else if (hasInSelf) {
|
||||
const r = whenInSelf(this.get(k)!, k);
|
||||
if (r.keep) coll.set(k, r.value);
|
||||
} else if (hasInOther) {
|
||||
const r = whenInOther(other.get(k)!, k);
|
||||
if (r.keep) coll.set(k, r.value);
|
||||
}
|
||||
}
|
||||
return coll;
|
||||
}
|
||||
|
||||
/**
|
||||
* The sorted method sorts the items of a collection and returns it.
|
||||
* The sort is not necessarily stable in Node 10 or older.
|
||||
* The default sort order is according to string Unicode code points.
|
||||
*
|
||||
* @param compareFunction - Specifies a function that defines the sort order.
|
||||
* If omitted, the collection is sorted according to each character's Unicode code point value,
|
||||
* according to the string conversion of each element.
|
||||
*
|
||||
* @example
|
||||
* collection.sorted((userA, userB) => userA.createdTimestamp - userB.createdTimestamp);
|
||||
*/
|
||||
public sorted(compareFunction: Comparator<K, V> = Collection.defaultSort) {
|
||||
return new this.constructor[Symbol.species](this).sort((av, bv, ak, bk) => compareFunction(av, bv, ak, bk));
|
||||
}
|
||||
|
||||
public toJSON() {
|
||||
// toJSON is called recursively by JSON.stringify.
|
||||
return [...this.values()];
|
||||
}
|
||||
|
||||
private static defaultSort<V>(firstValue: V, secondValue: V): number {
|
||||
return Number(firstValue > secondValue) || Number(firstValue === secondValue) - 1;
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates a Collection from a list of entries.
|
||||
*
|
||||
* @param entries - The list of entries
|
||||
* @param combine - Function to combine an existing entry with a new one
|
||||
*
|
||||
* @example
|
||||
* Collection.combineEntries([["a", 1], ["b", 2], ["a", 2]], (x, y) => x + y);
|
||||
* // returns Collection { "a" => 3, "b" => 2 }
|
||||
*/
|
||||
public static combineEntries<K, V>(
|
||||
entries: Iterable<[K, V]>,
|
||||
combine: (firstValue: V, secondValue: V, key: K) => V,
|
||||
): Collection<K, V> {
|
||||
const coll = new Collection<K, V>();
|
||||
for (const [k, v] of entries) {
|
||||
if (coll.has(k)) {
|
||||
coll.set(k, combine(coll.get(k)!, v, k));
|
||||
} else {
|
||||
coll.set(k, v);
|
||||
}
|
||||
}
|
||||
return coll;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* @internal
|
||||
*/
|
||||
export type Keep<V> = { keep: true; value: V } | { keep: false };
|
||||
|
||||
/**
|
||||
* @internal
|
||||
*/
|
||||
export type Comparator<K, V> = (firstValue: V, secondValue: V, firstKey: K, secondKey: K) => number;
|
||||
export * from './collection';
|
||||
|
||||
@@ -9,8 +9,12 @@ export default defineConfig({
|
||||
all: true,
|
||||
reporter: ['text', 'lcov', 'cobertura'],
|
||||
include: ['src'],
|
||||
// All ts files that only contain types, due to ALL
|
||||
exclude: ['**/*.{interface,type,d}.ts'],
|
||||
exclude: [
|
||||
// All ts files that only contain types, due to ALL
|
||||
'**/*.{interface,type,d}.ts',
|
||||
// All index files that *should* only contain exports from other files
|
||||
'**/index.{js,ts}',
|
||||
],
|
||||
},
|
||||
},
|
||||
});
|
||||
|
||||
Reference in New Issue
Block a user