例1
常用见的去除重复数组,但不能排序
代码如下 | 复制代码 |
Array.prototype.unique1 = function () { var r = new Array(); label:for(var i = 0, n = this.length; i < n; i++) { for(var x = 0, y = r.length; x < y; x++) { if(r[x] == this[i]) { continue label; } } r[r.length] = this[i]; } return r; } |
一个比较高级的但是我没看懂
代码如下 | 复制代码 |
Array.prototype.unique2 = function () { return this.sort().join(",,").replace(/(,|^)([^,]+)(,,2)+(,|$)/g,"$1$2$4").replace(/,,+/g,",").replace(/,$/,"").split(","); } |
例2
去除重复数组并排序
代码如下 | 复制代码 |
Array.prototype.unique = function(){ var a = {}; var len = this.length; for(var i=0; i<len; 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; } |
时间: 2024-09-22 13:26:23