golang判断key是否在map中的代码_Golang_

 func IsContain(items []string, item string) bool { for _, eachItem := range items { if eachItem == item { return true } } return false }

 var word := "my" var sentence := []string{"my","word","in","a","sentence"} if IsContain(sentence){ //包含 }else{ //不包含 }

 package main import ( "fmt" "regexp" ) func main() { //pattern := "\\d+" //反斜杠要转义 pattern := "[a-zA-Z]" //匹配字母 str := "a1.22.35.4" result, _ := regexp.MatchString(pattern, str) fmt.Println(result) //true }

 package main import "fmt" import "github.com/wxnacy/wgo/arrays" //go get github.com/wxnacy/wgo/arrays 安装包 func main() { str := "342" var numbers []string numbers = append(numbers, "3332", "342", "ssddd", "ssss", "%%%%") index := arrays.ContainsString(numbers, str) if index == -1 { fmt.Printf("not exists") //-1说明不存在 } else { fmt.Println(index) //存在则会返回元素的下标 } }