emberjs/ember.js — pull request #1286 by jankopriva (2012-08-16 10:07:47+00:00)
Title: Add #setObjects to mutable array. A helper for replacing whole content of the array with a new one

It shall make a life a bit easier in cases one needs to replace whole content of the array but keep the original array object. So, instead of doing:

var arr = obj.get('arr');
arr.replace(0, arr.length, newContent);

you can do just:

obj.get('arr').setObjects(newContent);