strings package in golang

package main

import (
  "strings";
  "fmt";
)

func main() {
  data := "bla blu blub";
  fmt.Println(data);
  // return: bla blu blub
  
  // convert string in bytes 
  b := strings.Bytes(data);
  fmt.Println(b);  // print every byte as array
  // return: [98 108 97 32 98 108 117 32 98 108 117 98]


  // test if the string begin with the prefix
  if strings.HasPrefix(data, "bl") {
    fmt.Println("data: \"", data, "\" begin with the prefix \"bl\"");
  }

  // test if the string end with the suffix
  if strings.HasSuffix(data, "blub") {
    fmt.Println("data: \"", data, "\" end with \"blub\"");
  }

  // Index returns the index of the first instance of sep in s, 
  // or -1 if sep is not present in s. 
  fmt.Println("index: ", strings.Index(data, "blu"));
  // return: index:  4

  fmt.Println("index: ", strings.Index(data, "b"));
  // return: index:  0
  fmt.Println("last index: ", strings.LastIndex(data, "b"));
  // return: last index:  11
  // LastIndex return the last occurency of seeking string

  // with Repeat you can repeat ;)
  fmt.Println("r: ", strings.Repeat("x", 10));
  // return: r:  xxxxxxxxxx

  // split the string in array of string
  as := strings.Split("root:alsdfjl:230:/blub/blub:lalalala", ":", 0);

  fmt.Println(as);
  // return: [root alsdfjl 230 /blub/blub lalalala]

  fmt.Println(strings.Join(as, "|"));
  // return: root|alsdfjl|230|/blub/blub|lalalala

  fmt.Println(strings.ToLower("UASFalsdfuADSFWE$$"));
  // return: uasfalsdfuadsfwe$$

  fmt.Println(strings.ToUpper("owenadsfoadsfj"));
  // return: OWENADSFOADSFJ

  fmt.Println("<", strings.TrimSpace("  asdf sdowe   "), ">");
  // return: < asdf sdowe >
}