golang中的字符串操作strings.Contains

package main
 
import (
        "fmt"
        "strings"
)
 
//golang字符串操作
func main(){
        s := "hello world hello world"
        str := "wo"
 
        //判断字符串s中是否包含个子串str。包含或者str为空则返回true
        index := strings.Contains(s,str)
        fmt.Println(index) //true
}