JavaScript数组排序和独特 [英] Javascript array sort and unique

问题描述

我有一个JavaScript数组像这样

I have a JavaScript array like this

var myData=['237','124','255','124','366','255'];

我需要的数组元素是唯一的，排序：

I need the array elements to be unique and sorted:

myData[0]='124';
myData[1]='237';
myData[2]='255';
myData[3]='366';

尽管数组的成员都喜欢整数，他们不是整数，因为我已经转换的各是字符串：

Even though the members of array are like integers they're not integers since I have already converted each to be string:

var myData[0]=num.toString();

等等...

有没有什么函数来完成所有这些任务在JavaScript中？

Is there any function to do all of these tasks in JavaScript?

推荐答案

这其实很简单 - 它要简单得多要做找到独特的价值，如果值进行排序：

This is actually very simple -- it is much simpler to do find unique values if the values are sorted:

function sort_unique(arr) {
    if (arr.length === 0) return arr;
    arr = arr.sort(function (a, b) { return a*1 - b*1; });
    var ret = [arr[0]];
    for (var i = 1; i < arr.length; i++) { // start loop at 1 as element 0 can never be a duplicate
        if (arr[i-1] !== arr[i]) {
            ret.push(arr[i]);
        }
    }
    return ret;
}
console.log(sort_unique(['237','124','255','124','366','255']));
//["124", "237", "255", "366"]

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