package main

import (
	"fmt"
	"sync"
)

var _ = sync.Map{}

func main() {
	m := sync.Map{}
	m.Store("demon", 1)
	m.Store("huohuojun", 2)
	m.Store("zhangqing", 3)

	m.Range(func(k, v interface{}) bool {
		fmt.Printf("name: %s,index: %d\n", k, v)
		return true
	})

	// load or store
	v, ok := m.LoadOrStore("zhangxi", 4)
	if ok {
		fmt.Println(v)
		fmt.Print("lalala")
	}

	m.Range(func(k, v interface{}) bool {
		fmt.Printf("name: %s,index: %d\n", k, v)
		return true
	})

	m.Delete("demon")
	m.Delete("huohuojun")

	m.Range(func(k, v interface{}) bool {
		fmt.Printf("name: %s,index: %d\n", k, v)
		return true
	})
}