go 字符串拼接

func main() {
  s1 := "Hello" + " " + "World"
  fmt.Println(s1)  //Hello World

  ss := []string{"Hello", "World"}
  fmt.Println(strings.Join(ss, " ")) //Hello World
}

+ 可以拼接任意多个字符串。但是+的缺点是待拼接的字符串必须是已知的。

另一种方式就是使用标准库strings包中的Join()函数，这个函数接受一个字符串切片和一个分隔符，将切片中的元素拼接成以分隔符分隔的单个字符串

 

func ConcatWithMultiPlus() {
  var s string
  for i := 0; i < 10; i++ {
    s += "hello"
  }
}

func ConcatWithOnePlus() {
  s1 := "hello"
  s2 := "hello"
  s3 := "hello"
  s4 := "hello"
  s5 := "hello"
  s6 := "hello"
  s7 := "hello"
  s8 := "hello"
  s9 := "hello"
  s10 := "hello"
  s := s1 + s2 + s3 + s4 + s5 + s6 + s7 + s8 + s9 + s10
  _ = s
}

func ConcatWithJoin() {
  s := []string{"hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello", "hello"}
  _ = strings.Join(s, "")
}

三种拼接字符串的方式