added updating of messages

lib/list.js

@@ -34,6 +34,22 @@ exports.List.prototype.length = function() {
 	return this.contents.length;
 }
 
+exports.List.prototype.getIndex = function( object ){
+
+	var index = false;
+
+	for(elementIndex in this.contents){
+		var element = this.contents[elementIndex];
+		if(	element[this.discriminator] == object[this.discriminator] ){
+			return elementIndex;
+		}
+
+	}
+
+	return index;
+
+}
+
 exports.List.prototype.removeIndex = function( index ) {
 	this.contents.splice( index, 1 );
 }
@@ -50,6 +66,20 @@ exports.List.prototype.removeElement = function( child ) {
 	return false;
 }
 
+exports.List.prototype.updateElement = function( child, newChild ){
+
+	for ( _element in this.contents ) {
+		var element = this.contents[_element];
+		if ( child[ this.discriminator ] == element[ this.discriminator ] ) {
+			this.contents[_element] = newChild;
+			return true;
+		}
+	}
+
+	return false;
+
+}
+
 exports.List.prototype.concatSublists = function( whereList, discriminator ) {
 	//this is meant to look at the contents, and assuming the contents are all lists, concatenate their values.