javascript - 对其中包含字符串的数组进行排序

Question

我正在尝试对其中包含字符串数组的数组进行排序。它类似于这个问题 ( Sort an array with arrays in it by string ) 但我不确定如何实现它。我的数组如下

var myArray = [
            ['blala', 'alfred', '...'],
            ['jfkdj', 'berta', '...'],
            ['vkvkv', 'zimmermann', '...'],
            ['cdefe', 'albert', '...'],
          ];

我试图按名称或内部数组的第二个参数按字母顺序(不区分大小写)对其进行排序。之后，如果有两个元素具有相同的第二个参数，我想按第一个参数排序。我尝试使用以下但没有成功，也没有真正明白为什么。任何人都可以建议:

function Comparator(a,b){
if (a[1] < b[1]) return -1;
if (a[1] > b[1]) return 1;
return 0;
}

var myArray = [
            ['blala', 'alfred', '...'],
            ['jfkdj', 'berta', '...'],
            ['vkvkv', 'zimmermann', '...'],
            ['cdefe', 'albert', '...'],
              ];

myArray = myArray.sort(Comparator);

要在第二个参数之后对第一个参数进行排序，我会这样做吗？

   function Comparator(a,b){
    if (a[1] < b[1]){ 
 if (a[2] < b[2]) return -1
 if (a[2] > b[2]) return 1;
}
return -1;
}
    if (a[1] > b[1]) return 1;{
    if (a[2] < b[2]) return -1
      if (a[2] > b[2]) return 1;
  }
return 1;
  }
return 0;
    }

    var myArray = [
                ['blala', 'alfred', '...'],
                ['jfkdj', 'berta', '...'],
                ['vkvkv', 'zimmermann', '...'],
                ['cdefe', 'albert', '...'],
                  ];

    myArray = myArray.sort(Comparator);

Answer 1

你可以编码:

function Comparator(a, b) {
    // you can use the `String.prototype.toLowerCase()` method
    // if the comparison should be case insensitive
    if (a[1] < b[1]) return -1;
    if (a[1] > b[1]) return 1;
    if (a[0] < b[0]) return -1;
    if (a[0] > b[0]) return 1;
    return 0;
}

上述函数首先根据数组的第二个元素对元素进行排序。如果第二个元素相等，则根据第一个元素对它们进行排序，如果 a[1] === b[1] 和 a[0] === b[0] 它返回 0，这使 a 和 b 位置保持不变。

From MDN Array.prototype.sort documentation :

If compareFunction is supplied, the array elements are sorted according to the return value of the compare function. If a and b are two elements being compared, then:

• If compareFunction(a, b) is less than 0, sort a to a lower index than b, i.e. a comes first.
• If compareFunction(a, b) returns 0, leave a and b unchanged with respect to each other, but sorted with respect to all different elements. Note: the ECMAscript standard does not guarantee this behaviour, and thus not all browsers (e.g. Mozilla versions dating back to at least 2003) respect this.
• If compareFunction(a, b) is greater than 0, sort b to a lower index than a. compareFunction(a, b) must always return the same value when given a specific pair of elements a and b as its two arguments. If inconsistent results are returned then the sort order is undefined.