Js中根据给定的输入对数组进行排序

Question

我有这样的数组：

Arr = [{name:"abc",age:1},{name:"a",age:4},{name:"ac",age:3},{name:"abc",age:2},{name:"abc",age:9}]

我想这样改：

[{name:"abc",age:1},{name:"abc",age:2},{name:"abc",age:9},{name:"a",age:4},{name:"ac",age:3}]

通过排序或交换。

Answer 1

试试这个

arr1.sort((a, b) => {
    if(a.name.startsWith(b.name)) { return -1; }
    if(a.name < b.name) { return -1; }
    if(a.name > b.name) { return 1; }
    return 0;
})

Answer 2

您可以使用 Map 收集相同命名的对象并取回扁平值。

此方法保持 name 的给定顺序并将该对象同名组合在一起。

var array = [{ name: "abc", age: 1 }, { name: "a", age: 4 }, { name: "ac", age: 3 }, { name: "abc", age: 2 }, { name: "abc", age: 9 }];

array = Array
    .from(array
        .reduce((m, o) => m.set(o.name, [...(m.get(o.name) || []), o]), new Map)
        .values()
    )
    .flat();

console.log(array);

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