如何根据类别排序数组

Question

我得到了以下对象数组：

var source =  [
{"name": "title_1", "category": "order"},
{"name": "title_2", "category": "purchase"},
{"name": "title_3", "category": "order"},
{"name": "title_4", "category": "detail"},
{"name": "title_5", "category": "order"},
{"name": "title_6", "category": "purchase"},
]

我需要对这个数组进行排序，以获得有序的元素(第一个订单，第二个细节，第三个购买(：

console.log(source.sort(function () {
// todo: ?
}))

预期结果：

[
{"name": "title_1", "category": "order"},
{"name": "title_3", "category": "order"},
{"name": "title_5", "category": "order"},
{"name": "title_4", "category": "detail"},
{"name": "title_2", "category": "purchase"},
{"name": "title_6", "category": "purchase"},
]

如何编写排序函数以获得预期结果？

Answer 1

您可以创建一个拥有每个类别优先级的对象，然后根据该对象对其进行排序。

const source =  [
{"name": "title_1", "category": "order"},
{"name": "title_2", "category": "purchase"},
{"name": "title_3", "category": "order"},
{"name": "title_4", "category": "detail"},
{"name": "title_5", "category": "order"},
{"name": "title_6", "category": "purchase"},
];
const priority = {
order: 3,
detail: 2,
purchase: 1,
};
const r = source.sort((a, b) => priority[b.category] - priority[a.category]);
console.log(r);