分时函数

gistfile1.js

	var timeChunk = function(ary,fn,count){
		var obj,t;
		var len = ary.length;
		var start = function(){
			for(var i = 0 ;i<Math.min(count || 1 , ary.length);i++){
				var obj = ary.shift();
				fn(obj);
			}
		};
		return function(){
			t = setInterval(function(){
				if(ary.length === 0){
					return clearInterval(t);
				}
				start();
			},200);
		}
	}

	var ary = [];
	for (var i = 0; i < 10000; i++) {
		ary.push(i);
	}

	var renderFriendList = timeChunk(ary,function(n){
		var div = document.createElement('div');
		div.innerHTML = n;
		document.body.appendChild(div);
	},8);

	renderFriendList()