<script>
var strr="北京,上海市,深圳,海南,北京,海南";
function show(str){
var ary= new Array();
ary=str.split(",");
for(var i=0,i<ary.length;i++){if(i=0){
str=ary[i];
}
else{
for(var j=1,j<ary.length;j++){
if(ary[i]!=ary[j])
str=str+","+ary[i];
}
}
}
return str
}
show(strr);
</script>
随手下的一个
<script type="text/javascript">
var s = "北京,上海市,深圳,海南,北京,海南", n = "";
do {
n = s.replace(/([^,]+),(.*)\1(,|$)/g, "$1,$2");
} while (n != s && (s = n));
s = s.replace(/,$/, "");
alert(s);
</script>
<script type="text/javascript">
Array.prototype.unique = function()
{
var a = {}; for(var i=0; i<this.length; i++)
{
if(typeof a[this[i]] == "undefined")
a[this[i]] = 1;
}
this.length = 0;
for(var i in a)
this[this.length] = i;
return this;
}
var str="北京,上海市,海南,北京,海南"
alert(str +"\n"+ str.split(",").unique());
</script>
{
this.arr = str.split(",");
}
a.prototype.delRepeat = function()
{
for(var i = 0; i < this.arr.length; i++)
{
for(var j = i + 1; j < this.arr.length; j++)
{
if (this.arr[i] == this.arr[j])
{
this.arr.splice(j, 1);
}
}
}
return this.arr.join(",");
}//调用方法
str = "北京,上海市,深圳,海南,北京,海南" ;
var b = new a(str);
var newStr = b.delRepeat();
alert(newStr);
var s = str.split(",");
var d = Array();
for(i=0;i<s.length;i++)
{
if(!inArr(d,s[i]))
d.push(s[i]);
}
document.write(d.toString())
function inArr(arr,s)
{
for(j=0;j<arr.length;j++)
{
if(s==arr[j])
{
return true;
break;
}
}
return false;
}
var arr=str.split(',');
arr.sort();for(var i=0;i<arr.length-1;i++)
{
if(arr[i]==arr[i+1]){alert(arr.splice(i,1));}
}
str=arr.join();
alert(str)
var s = "北京,上海市,深圳,海南,北京,海南", n = "";
do {
n = s.replace(/([^,]+),(.*)\1(,|$)/g, "$1,$2");
} while (n != s && (s = n));
s = s.replace(/,$/, "");
alert(s);
</script>