From 71968e09733753ce0e7d8a03f51ffeed768437d7 Mon Sep 17 00:00:00 2001
From: Tobias Beer <beertobias@gmail.com>
Date: Tue, 27 Jan 2015 19:31:23 +0100
Subject: [PATCH] added $tw.utils.pushOnce

retained check for basic each nonetheless

tests pass
---
 boot/boot.js | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/boot/boot.js b/boot/boot.js
index acdfa0327..68eb80799 100644
--- a/boot/boot.js
+++ b/boot/boot.js
@@ -84,6 +84,15 @@ $tw.utils.each = function(object,callback) {
 	}
 };
 
+/*
+Pushes a value to an array only when not yet contained.
+*/
+$tw.utils.pushOnce = function(array,value) {
+	if(0 > array.indexOf(value)){
+		array.push(value);
+	}
+}
+
 /*
 Helper for making DOM elements
 tag: tag name