如何删除数组中重复的值？

[phoenix-sky]

比如：

var list=["iPod","iMac","Macbook Pro","iMac","iPhone","iPad","iMac","iPod"];
/*
list数组中iMac重复2次，iPod重复1次；
如何删除数组中重复的值？
*/

[豪情]

$.unique(["iPod","iMac","Macbook Pro","iMac","iPhone","iPad","iMac","iPod"])

[兰溪小城]

list =list.sort(); $.unique(list);

[Cocl]

function unique(arr) {
    var result = [], hash = {};
    for (var i = 0, elem; (elem = arr[i]) != null; i++) {
        if (!hash[elem]) {
            result.push(elem);
            hash[elem] = true;
        }
    }
    return result;
}

[tony4geek]

var list='["iPod","iMac","Macbook Pro","iMac","iPhone","iPad","iMac","iPod"]';
;
alert(list.replace(/,/g,"").replace(/("[^"].*[^"]")(?=.*\1)/g, "").replace(/""/g, '","').split(','));

[tony4geek]

写错了。

var list='["iPod","iMac","Macbook Pro","iMac","iPhone","iPad","iMac","iPod"]'; 
 
alert(eval('(' +list.replace(/,/g,"").replace(/("[^"].*[^"]")(?=.*\1)/g, "").replace(/""/g, '","')+')' ));

[别闹腰不好]

http://www.1008a.com/post/277.html

[zilong-thu]

http://borninsummer.com/blog/2013/12/09/javascript-array-unique/

[天际的海浪]

引用 楼主 mycggo 的回复:

比如：

var list=["iPod","iMac","Macbook Pro","iMac","iPhone","iPad","iMac","iPod"];
/*
list数组中iMac重复2次，iPod重复1次；
如何删除数组中重复的值？
*/

var list=["iPod","iMac","Macbook Pro","iMac","iPhone","iPad","iMac","iPod"];
list=("@"+list.join("#@")+"#").replace(/(@.*?#)(?=.*\1)/ig,"").slice(1,-1).split("#@");
alert(list);

[phoenix-sky]

谢谢楼上各位，根据你们提供的方法，写了一个我比较容易理解的，谢谢！

<script>
    function unique(arr){
        var res = [];
        var json = {};
        for(var i = 0; i < arr.length; i++){
            if(!json[arr[i]]){
                res.push(arr[i]);
                json[arr[i]] = true;
            }
        }
        return res;
    };

    var list=["iPod","iMac","iMac","iWatch","Mac OS X","iPhone","iWatch","iPad","iMac","iPod"];
    console.log(list.join(', '));
    console.log(unique(list).join(', '));
</script>