e.g.

package main

import (
    "fmt"
)

func main() {
    m := make(map[string]string)
    m["hello"] = "echo hello"
    m["world"] = "echo world"
    m["go"] = "echo go"
    m["is"] = "echo is"
    m["cool"] = "echo cool"

    for k, v := range m {
        fmt.Printf("k=%v, v=%v\n", k, v)
    }
}

修正版

e.g.

package main

import (
    "fmt"
    "sort"
)

func main() {
    m := make(map[string]string)
    m["hello"] = "echo hello"
    m["world"] = "echo world"
    m["go"] = "echo go"
    m["is"] = "echo is"
    m["cool"] = "echo cool"

    sorted_keys := make([]string, 0)
    for k, _ := range m {
        sorted_keys = append(sorted_keys, k)
    }

    sort.Strings(sorted_keys)

    for _, k := range sorted_keys {
        fmt.Printf("k=%v, v=%v\n", k, m[k])
    }
}