sync.Map取值

ipTable类型是sync.Map，key全部是IP地址，value全部是true，长度未知，现在需要提取所有IP地址赋值给一个变量，每个IP以逗号间隔

package main

import (
    "fmt"
    "sync"
)

func main() {
    var ipTable sync.Map
    ipTable.Store("10.0.0.1", true)
    ipTable.Store("10.0.0.2", true)
    ipTable.Store("10.0.0.3", true)
    ipTable.Store("10.0.0.4", true)

    val := ""
    flag := true
    ipTable.Range(func(key, value interface{}) bool {
        if flag {
            flag = false
        } else {
            val += ","
        }
        val += key.(string)
        return true
    })
    fmt.Println(val)
}

package main
​
import (
     "fmt"
     "sync"
)
​
func main() {
​
   var scene sync.Map
​
   // 将键值对保存到sync.Map
   scene.Store("greece", 97)
   scene.Store("london", 100)
   scene.Store("egypt", 200)
​
   // 从sync.Map中根据键取值
   fmt.Println(scene.Load("london"))
​
   // 根据键删除对应的键值对
   scene.Delete("london")
​
   // 遍历所有sync.Map中的键值对
   scene.Range(func(k, v interface{}) bool {
​
       fmt.Println("iterate:", k, v)
       return true
  })
​
}

https://blog.csdn.net/Guzarish/article/details/118626391?spm=1005.2026.3001.5635&utm_medium=distribute.pc_relevant_ask_down.none-task-blog-2~default~OPENSEARCH~Rate-4.pc_feed_download_top3ask&depth_1-utm_source=distribute.pc_relevant_ask_down.none-task-blog-2~default~OPENSEARCH~Rate-4.pc_feed_download_top3ask

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