js去除数组重复项,删除重复数据的方法

来源：互联网发布：彩票开奖api 源码编辑：程序博客网时间：2024/06/09 19:09

var arr = [3,3,1,6,7,4,4,1];   var o = {};   for(var i = 0; i < arr.length; i++)   {     o[arr[i]] = arr[i];   }   arr = [];   for (var el in o)   {     if (el == o[el])     arr.push(el - 0);   }   alert(arr);

var clearRepeat=function(a){               var c=[],b={};                              for(var i=0;i<a.length;i++){                       if( ! b[0+a[i]]){                               b[a[i]]=1;                               c.push(a[i])                           }                   }               return c;           }              var a=[undefined,4,5,6,7,8,9,10,11,"aa","bb","aa","bb","$#@@","!*&^%%","$#@@","!*&^%%",0,"0"];       //请注意上面数组的0,"0"项目。是可以正常处理的。因为他们的数据类型不一样所以他不能算是重复项              var c=clearRepeat(a);       alert(c.join())

Array.prototype.del = function() { var a = {}, c = [], l = this.length; for (var i = 0; i < l; i++) {   var b = this[i];   var d = (typeof b) + b;   if (a[d] === undefined) {     c.push(b);     a[d] = 1;   } } return c; } alert([1, 1, 2, 3, 4, 5, 4, 3, 4, 4, 5, 5, 6, 7].del());

Array.prototype.unique = function(){    var o = {}, re = [];    for(var i=0, len = this.length;i<len; i++){        if(!o[this[i]]){            o[this[i]] = true;            re.push(this[i]);        }    }    return re;}var arr = [1,2,3,2,3,4,1,2,3,1,1,1,5,6];console.log( arr.unique() );

var arr = ["123","123","123","123","sfsdf","123","345","123","123","345","456","567","sdc"]; var str = []; for(var i = 0,len = arr.length;i < len;i++){   !RegExp(arr[i],"g").test(str.join(",")) && (str.push(arr[i])); } alert(str);