Golang map输出排序

package main

import (
    "fmt"
    "sort"
)

func main() {
    fmt.Println("====依据key排序=====")
    z := map[int]string{
        1: "Mike",
        2: "Nike",
        3: "LiNing",
        4: "Erck",
    }

    var keys []int
    for key := range z {
        keys = append(keys, key)
    }

    sort.Ints(keys)

    for _, k := range keys {
        fmt.Println("Key:", k, "Value:", z[k])
    }

    fmt.Println("====依据value排序=====")

    m := map[string]int{
        "something": 10,
        "yo":        20,
        "blah":      20,
    }

    type kv struct {
        Key   string
        Value int
    }

    var ss []kv
    for k, v := range m {
        ss = append(ss, kv{k, v})
    }

    sort.Slice(ss, func(i, j int) bool {
        return ss[i].Value > ss[j].Value // 降序
        // return ss[i].Value < ss[j].Value  // 升序
    })

    for _, kv := range ss {
        fmt.Println("Key:", kv.Key, "Value:", kv.Value)
    }
}