<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>数组去重</title>
</head>
<body>
</body>
<script type="text/javascript">
Array.prototype.norepeat = function (fn){
this.sort( );//首先排序数组
var result = [ this[ 0 ] ];//定义新数组result并把原数组第一项插入
for( var i = 1 ; i < this.length;i++){//循环原数组这里循环开始是从原数组第二位开始的
if( this[ i ] !== result [ result.length - 1 ] ){//比较关键点在！== 当你换成！= 会发现1和'1'也会合并成1
result.push( this[ i ] );
}
}
return result;
}
var arr = [1,'1',2,3,'q',2,2]
console.log(arr.norepeat())
</script>
</html>