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I got an array (see below for one object in the array) that I need to sort by firstname using JavaScript. 我有一个数组（请参阅下面的数组中的一个对象），我需要使用JavaScript对firstname进行排序。 How can I do it? 我该怎么做？

var user = {   bio: null,   email:  "user@domain.com",   firstname: "Anna",   id: 318,   lastAvatar: null,   lastMessage: null,   lastname: "Nickson",   nickname: "anny"};

#1楼

参考：

#2楼

If compared strings contain unicode characters you can use of String class like the following: 如果比较字符串包含unicode字符，则可以使用String类的 ，如下所示：

users.sort(function(a,b){    return a.firstname.localeCompare(b.firstname);})

#3楼

offers the very nice _.sortBy function: 提供了非常好的_.sortBy函数：

_.sortBy([{a:1},{a:3},{a:2}], "a")

or you can use a custom sort function: 或者您可以使用自定义排序功能：

_.sortBy([{a:"b"},{a:"c"},{a:"a"}], function(i) {return i.a.toLowerCase()})

#4楼

A more compact notation: 更紧凑的符号：

user.sort(function(a, b){    return a.firstname === b.firstname ? 0 : a.firstname < b.firstname ? -1 : 1;})

#5楼

You can use the in-built array method - sort . 您可以使用内置数组方法 - sort 。 This method takes a callback method as a param 此方法将回调方法作为参数

// custom sort function to be passed as param/callback to the Array's sort method    function myCustomSort(a, b) {        return (a.toLowerCase() > b.toLowerCase()) ? 1 : -1;    }    // Actual method to be called by entity that needs sorting feature    function sortStrings() {        var op = Array.prototype.sort.call(arguments, myCustomSort);    }    // Testing the implementation    var sortedArray = sortStrings("Burger", "Mayo1", "Pizza", "boxes", "Apples", "Mayo");    console.log(sortedArray); //["Apples", "boxes", "Burger", "Mayo", "Mayo1", "Pizza"]

Key Points to be noted for understanding this code. 理解此代码需要注意的要点。

1. The custom method, in this case, myCustomSort , should return +1 or -1 for each element pair(from the input array) comparison. 自定义方法（在本例中为myCustomSort ）应为每个元素对（来自输入数组）的比较返回+1或-1。
2. Use toLowerCase() / toUpperCase() in the custom sorting callback method so that case difference does not affect the correctness of the sorting process. 在自定义排序回调方法中使用toLowerCase() / toUpperCase() ，以便大小写差异不会影响排序过程的正确性。

I hope this is clear enough explanation. 我希望这是足够明确的解释。 Feel free to comment if you think, more info is needed. 如果您认为，请随时发表评论，需要更多信息。

Cheers! 干杯!

#6楼

You can use something similar, to get rid of case sensitive 您可以使用类似的东西来摆脱区分大小写

users.sort(function(a, b){  //compare two values  if(a.firstname.toLowerCase() < b.firstname.toLowerCase()) return -1;  if(a.firstname.toLowerCase() > b.firstname.toLowerCase()) return 1;  return 0;})

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