40 lines
783 B
Go
40 lines
783 B
Go
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/*
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* @Author : huangzj
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* @Time : 2020/7/13 14:22
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* @Description：
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*/
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package originGoLanguage
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import "fmt"
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func TestMap() {
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//没有初始化的是nil,不能进行赋值
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var countryMap1 map[string]string
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fmt.Println(countryMap1 == nil)
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countryMap := make(map[string]string)
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countryMap["a"] = "aCountry"
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countryMap["b"] = "bCountry"
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countryMap["c"] = "cCountry"
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countryMap["d"] = "dCountry"
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for key, value := range countryMap {
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fmt.Println(key + " is " + value)
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}
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//获取Map的值
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mValue, ok := countryMap["a"]
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fmt.Println(ok, mValue)
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mValue1, ok1 := countryMap["aaaa"]
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fmt.Println(ok1, mValue1)
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//删除map中的元素
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delete(countryMap, "a")
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delete(countryMap, "b")
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for key, value := range countryMap {
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fmt.Println(key + " is " + value)
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}
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}
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