التكرار والترتيب

package main

import "fmt"

func main() {
	m := map[string]int{"a": 1, "b": 2}
	for k, v := range m {
		fmt.Println(k, v)
	}
}

package main

import "fmt"

func main() {
	m := map[string]int{"a": 1, "b": 2, "c": 3}
	for k := range m {
		fmt.Println(k)
	}
}

package main

import "fmt"

func main() {
	m := map[string]int{"a": 1, "b": 2, "c": 3}
	keys := []string{}
	for k := range m {
		keys = append(keys, k)
	}
	fmt.Println("collected", len(keys), "keys")
}

package main

import (
	"fmt"
	"sort"
)

func main() {
	m := map[string]int{"c": 3, "a": 1, "b": 2}
	keys := []string{}
	for k := range m {
		keys = append(keys, k)
	}
	sort.Strings(keys)
	for _, k := range keys {
		fmt.Println(k, m[k])
	}
}

package main

import (
	"fmt"
	"sort"
)

func main() {
	m := map[int]string{3: "c", 1: "a", 2: "b"}
	keys := []int{}
	for k := range m {
		keys = append(keys, k)
	}
	sort.Ints(keys)
	for _, k := range keys {
		fmt.Println(k, m[k])
	}
}

package main

import "fmt"

func main() {
	m := map[string]int{"a": 1, "b": 2, "c": 3}
	for k := range m {
		if k == "b" {
			delete(m, k)
		}
	}
	fmt.Println(len(m))
}

package main

import (
	"fmt"
	"sort"
)

func main() {
	m := map[string]int{"a": 3, "b": 1, "c": 2}
	keys := []string{}
	for k := range m {
		keys = append(keys, k)
	}
	sort.Slice(keys, func(i, j int) bool {
		return m[keys[i]] < m[keys[j]]
	})
	for _, k := range keys {
		fmt.Println(k, m[k])
	}
}