JS数组去重与取重的示例代码

方法一：去重复数据
复制代码代码如下:
<script>
Array.prototype.distinct=function（）{
var a=[],b=[];
for（var prop in this）{
   var d = this[prop];
   if （d===a[prop]） continue; //防止循环到prototype
   if （b[d]！=1）{
    a.push（d）;
    b[d]=1;
   }
}
return a;
}
var x=["a","b","c","d","b","a","e","a","b","c","d","b","a","e"];
document.write（"原始数组:"+x）;
document.write（"<br />"）;
document.write（"去重复后:"+x.distinct（））;
</script>

方法二：取重复数据
复制代码代码如下:
<script type="text/javascript">
Array.prototype.distinct=function（）{
   var a=[],b=[],c=[],d=[];
   for（var prop in this）{
    var d = this[prop];
    if （d===a[prop]）
    {
    continue;
    }//防止循环到prototype
    if （b[d]！=1）{
     a.push（d）;
     b[d]=1;
    }
    else {

     c.push（d）;
     d[d]=1;
    }
   }
   //return a;
   return c.distinct1（）;
}
Array.prototype.distinct1=function（）{
var a=[],b=[];
for（var prop in this）{
   var d = this[prop];
   if （d===a[prop]） continue; //防止循环到prototype
   if （b[d]！=1）{
    a.push（d）;
    b[d]=1;
   }
}
return a;
}
var x=["a","b","c","d","b","a","e","a","b","c","d","b","a","e","f","f","g"];
document.write（"原始数组:"+x）;
document.write（"<br />"）;
document.write（"去重复后:"+x.distinct（））;
</script>