分组数组

入参	功能	类型	默认	说明
arr	数组	Array	[]	-
key	属性	String/Number	""	-

import { GroupArr } from "@yangzw/bruce-us";

const arr = [
	{ area: "德国", name: "奔驰" },
	{ area: "德国", name: "宝马" },
	{ area: "德国", name: "奥迪" },
	{ area: "英国", name: "捷豹" },
	{ area: "英国", name: "路虎" }
];

GroupArr(arr, "area"); // { 德国: Array(3), 英国: Array(2) }