//数组去重

Array.prototype.unique = function(){

 var res = [];  var json = {};  for(var i = 0; i < this.length; i++){   if(!json[this[i]]){    res.push(this[i]);    json[this[i]] = 1;   }  }  return res; } var arr = [112,112,112,34,'你好',112,112,34,'你好','str','str1']; console.log(arr.unique());