javascript - 按自定义订单排序

Question

我想知道如何按自定义顺序而不是按字母顺序对数组进行排序。想象一下你有这个数组/对象:

var somethingToSort = [{
    type: "fruit",
    name: "banana"
}, {
    type: "candy",
    name: "twix"
}, {
    type: "vegetable",
    name: "broccoli"
}, {
    type: "vegetable",
    name: "carrot"
}, {
    type: "fruit",
    name: "strawberry"
}, {
    type: "candy",
    name: "kitkat"
}, {
    type: "fruit",
    name: "apple"
}];

这里有 3 种不同的类型:水果、蔬菜和糖果。现在我想对这个数组进行排序，并确保所有水果都在前面，糖果在水果后面，蔬菜在最后。每种类型都需要按字母顺序对它们的项目进行排序。我们将使用类似 sortArrayOnOrder ( ["fruit","candy","vegetable"], "name" ); 的函数所以基本上，排序后你会得到这个数组:

var somethingToSort = [{
    type: "fruit",
    name: "apple"
}, {
    type: "fruit",
    name: "banana"
}, {
    type: "fruit",
    name: "strawberry"
}, {
    type: "candy",
    name: "kitkat"
}, {
    type: "candy",
    name: "twix"
}, {
    type: "vegetable",
    name: "broccoli"
}, {
    type: "vegetable",
    name: "carrot"
}];

有人知道如何为此创建脚本吗？

Answer 1

Cerbrus 代码的改进版本:

var ordering = {}, // map for efficient lookup of sortIndex
    sortOrder = ['fruit','candy','vegetable'];
for (var i=0; i<sortOrder.length; i++)
    ordering[sortOrder[i]] = i;

somethingToSort.sort( function(a, b) {
    return (ordering[a.type] - ordering[b.type]) || a.name.localeCompare(b.name);
});