javascript - 如何在javascript中按两个名称对数组进行排序？

Question

我已经看到了如何按一个值(文本或数字)和两个数字(年份和某物的计数)对数组进行排序的问题和答案。

如何按升序对一个字符串进行排序，并按特殊顺序对另一个字符串进行排序？

这是数组中的一个对象

var stop = {
    type: "S", // values can be S, C or H. Should ordered S, C and then H.
    street: "SW Dummy St." // Should be sorted in ascending order
}

预期的最终结果应该是这样的

var data = [
    { type: 'S', year: 'SW Karp' },
    { type: 'S', year: 'SW Walker' },
    { type: 'C', year: 'SW Greth' },
    { type: 'C', year: 'SW Main' }
    { type: 'H', year: 'SW Dummy' }
];

Answer 1

Array.sort() 方法接受一个排序函数，它允许您自己实现排序。

data.sort(function (a, b) {
    // Specify the priorities of the types here. Because they're all one character
    // in length, we can do simply as a string. If you start having more advanced
    // types (multiple chars etc), you'll need to change this to an array.
    var order = 'SCH';
    var typeA = order.indexOf(a.type);
    var typeB = order.indexOf(b.type);

    // We only need to look at the year if the type is the same
    if (typeA == typeB) {
        if (a.year < b.year) {
            return -1;
        } else if (a.year == b.year) {
            return 0;
        } else {
            return 1;
        }

    // Otherwise we inspect by type
    } else {
        return typeA - typeB;
    }
});

Array.sort()如果 a == b 则期望返回 0 , < 0 如果 a < b且 > 0 如果 a > b .

你可以在这里看到它的工作原理； http://jsfiddle.net/32zPu/