<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>去重</title>
</head>
<body>
<script type="text/javascript">
/*数组去重*/
function quchong(arr){
var len = arr.length;
arr.sort();
for(var i=len-1;i>0;i--){
if(arr[i]==arr[i-1]){
arr.splice(i,1);
}
}
return arr;
}
var a = ["a","a","b",'b','c','c','a','d'];
var b = quchong(a);
console.log(b);
/*字符串去重*/
function quchongstr(str){
var a = str.match(/\S+/g);//等价于str.split(/\s+/g)// \s空白符，\S非空白符
a.sort();
for(var i=a.length-1;i>0;i--){
if(a[i]==a[i-1]){
a.splice(i,1);
}
}
return a.join(" ");
}
var str = quchongstr("a a b a b e");
console.log(str); </script>
</body>
</html>