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Example of how to remove duplicate values from an array using JS
- 高洛峰Original
- 2017-02-20 16:31:411472browse
This article mainly introduces the method of deduplicating values in JS and analyzes the operation skills of JS to deduplicate values through array traversal, operation and other methods in the form of examples. Friends in need can refer to it
The example in this article describes how to implement array deduplication using JS. Share it with everyone for your reference, the details are as follows:
The running effect diagram is as follows:
The complete example code is as follows:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Test</title>
<script type="text/javascript" language="javascript" >
Array.prototype.distinct = function(){
var $ = this;
var o1 = {}; //存放去重复值
var o2 = {}; //存放重复值
var o3 = []; //存放重复值
var o; //数组单个变量
for(var i=0;o = $[i];i++){
if(o in o1){
if(!(o in o2)) o2[o] = o;
delete $[i];
}else{
o1[o] = o;
}
}
$.length = 0; //清空原数组
for(o in o1){
$.push(o);
}
for(o in o2){
o3.push(o);
}
return o3;
}
var a = [2,2,2,3,3,3,4,4,5,6,7,7];
console.log("原数组：" + a); //2,2,2,3,3,3,4,4,5,6,7,7
console.log("有重复的元素是：" + a.distinct()); //2,3,4,7
console.log("整理后的数组是：" + a); //2,3,4,5,6,7
console.log("整理后的长度是:" + a.length) //6
</script>
</head>
<body>
</body>
</html>
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