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<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>JS数组去重和取重</title>
</head>
<script src="https://cdn.jsdelivr.net/npm/vue@2.5.17/dist/vue.js"></script>
<body>
</body>
<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 = [1,1,2,2,3,4,4,5];
document.write('原始数组:' + x);
document.write("<br />");
document.write('去重复后:' + x.distinct());
document.write("<br />");
</script>
方法二：取重复数据
<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 = [1,1,2,2,3,4,4,5];
document.write("<br />");
document.write('原始数组:' + x);
document.write("<br />");
document.write('去重复后:' + x.distinct());
</script>
</html>
