分时函数，将一次性大批量的操作分割成多次小批量

timechunk.js

//ary为要批量处理的数据，fn为对每个数据的操作方式，count为每次处理的量
var timechunk = function(ary, fn, count){
  var obj,
      timer;
  var start = function(){
    for(var i = 0; i < count; i++){
      if(ary.length === 0){
        return;
      }
      obj = ary.shift();
      fn(obj);
    }
  }
  return function(){
    start();//首次执行不用延后
    timer = setInterval(function(){
      if(ary.length === 0){
        clearInterval(timer);
        timer = null;
        return;
      }else{
        start();
      }
    }, 1000);
    //时间间隔也可以通过参数指定
  }
}

var data = [1,2,3,4,5,6,7,8,9,10];
function print(i){
  console.log(i);
}
var printPer3 = timechunk(data, print, 3);
printPer3();