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>