JavaScript排序对象

Question

我有一个组对象(name、noWords、score、JavaScript )

flower - 1 - 88 - 0
flower - 1 - 99 - 0
flower,spring - 2 - 39 - 1
flower,spring - 2 - 58 - 1
flower,time - 2 - 20 - 2
flower,time - 2 - 53 - 2
spring,time - 2 - 55 - 3
flower,spring,time - 3 - 79 - 4
flower,spring,time - 3 - 121 - 4

我想像这样对这个对象进行排序:首先考虑单词的数量-它是这样产生的，然后如果有更多的组具有相同的单词数，则按每个组的较大值进行排序

预期结果

flower - 1 - 88 - 0
flower - 1 - 99 - 0
flower,time - 2 - 20 - 2
flower,time - 2 - 53 - 2
spring,time - 2 - 55 - 3
flower,spring - 2 - 39 - 1
flower,spring - 2 - 58 - 1
flower,spring,time - 3 - 79 - 4
flower,spring,time - 3 - 121 - 4

Answer 1

假设您的对象在数组中，您可以使用自定义排序方法来比较两个条目。

var myObjects = [ /* assuming this is filled. */ ];

myObjects.sort(function (a, b) {

    // a and b will be two instances of your object from your list

    // possible return values
    var a1st = -1; // negative value means left item should appear first
    var b1st =  1; // positive value means right item should appear first
    var equal = 0; // zero means objects are equal

    // compare your object's property values and determine their order
    if (b.noWords < a.noWords) {
        return b1st;
    }
    else if (a.noWords < b.noWords) {
        return a1st;
    }

    // noWords must be equal on each object
    if (b.group < a.group) {
        return b1st;
    }
    else if (a.group < b.group) {
        return a1st;
    }

    // group must be equal
    // TODO continue checking until you make a decision

    // no difference between objects
    return equal;
});

你对你想要的东西如何订购的描述不清楚，所以我把这部分留给你。

Answer 2

首先，你指的是Array。不能对Object进行排序。

您需要的是执行用户排序。为此，您可以使用Array.sort()方法和自定义排序函数。在该函数中，您放置了比较算法。

简单的例子：

myArray = [5, 3, 7, 9];
myArray.sort(function(a, b){
    if(a > b)
        return -1; // negative means that the elements are not in the right order and should be switched
    else
        return 1; // positive means that the element are in the desired order
});

sort方法为您完成所有排序，但您必须提供比较任意两个元素的方法。