delete() 函数
delete(map, key) 函数用于删除集合的元素, 参数为 map 和其对应的 key。删除函数不返回任何值。
package mainimport "fmt"func main() { countryCapitalMap := map[string] string {"France":"Paris","Italy":"Rome","Japan":"Tokyo","India":"New Delhi"} fmt.Println("原始 map") for country := range countryCapitalMap { fmt.Println("Capital of",country,"is",countryCapitalMap[country]) } delete(countryCapitalMap,"France"); fmt.Println("Entry for France is deleted") fmt.Println("删除元素后 map") for country := range countryCapitalMap { fmt.Println("Capital of",country,"is",countryCapitalMap[country]) }}运行结果：
原始 mapCapital of France is ParisCapital of Italy is RomeCapital of Japan is TokyoCapital of India is New DelhiEntry for France is deleted删除元素后 mapCapital of Italy is RomeCapital of Japan is TokyoCapital of India is New Delhi
