golang中map声明及初始化

1 map简介

2 map声明

var map变量名 map[key] value

var numbers map[string] int var myMap map[string] personInfo

type personInfo struct {

    ID string     Name string     Address string }

3 map初始化

rating := map[string] float32 {"C":5, "Go":4.5, "Python":4.5, "C++":2 } myMap := map[string] personInfo{"1234": personInfo{"1", "Jack", "Room 101,..."},}

numbers := make(map[string] int)

myMap = make(map[string] personInfo)

myMap = make(map[string] personInfo, 5)

numbers["one"] = 1  myMap["1234"] = personInfo{"1", "Jack", "Room 101,..."}

4 map元素查找

value, ok := myMap["1234"] if ok{     //处理找到的value }

5 map元素修改（赋值）

numbers["one"] = 11

5.2 间接修改

numbersTest := numbers numbersTest["one"] = "111"

6 map元素删除

delete(number, "one")

文章来源: golang中map声明及初始化