added Array.from as a [].slice.call alias

Author: Zirak

source/plugins/roomPermissions.js

@@ -37,7 +37,7 @@ function giveVoice ( id, cb ) {
 	});
 
 	function finish () {
-		var args = [].slice.call( arguments );
+		var args = Array.from( arguments );
 		args.unshift( id );
 
 		delete muted[ id ];

source/plugins/substitution.js

@@ -48,7 +48,7 @@ function substitute ( msg ) {
 }
 
 function get_matching_message ( re, onlyBefore ) {
-	var messages = [].slice.call(
+	var messages = Array.from(
 		document.getElementsByClassName('content') ).reverse();
 	return messages.first( matches );
 

source/util.js

@@ -26,11 +26,16 @@ Object.TruthMap = function ( props ) {
 	}
 };
 
+//turns a pseudo-array (like arguments) into a real array
+Array.from = function ( arrayLike, start ) {
+	return [].slice.call( arrayLike, start );
+};
+
 //SO chat uses an unfiltered for...in to iterate over an array somewhere, so
 // that I have to use Object.defineProperty to make these non-enumerable
 Object.defineProperty( Array.prototype, 'invoke', {
 	value : function ( funName ) {
-		var args = [].slice.call( arguments, 1 );
+		var args = Array.from( arguments, 1 );
 
 		return this.map( invoke );
 
@@ -151,7 +156,7 @@ Function.prototype.memoizeAsync = function ( hasher ) {
 	hasher = hasher || function (x) { return x; };
 
 	return function memoized () {
-		var args = [].slice.call( arguments ),
+		var args = Array.from( arguments ),
 			cb = args.pop(), //HEAVY assumption that cb is always passed last
 			hash = hasher.apply( null, arguments );