Go programming example [String function String]

The standard library's strings package provides many useful string-related functions.
Here are some examples to give you a preliminary understanding of the package.
You can find more functions in the strings package documentation.

// string-functions.go
package main

import (
	"fmt"
	s "strings"
)

// 我们给 `fmt.Println` 一个短名字的别名，我们随后将会经常用到。
var p = fmt.Println

func main() {
    
    

	// 这是一些 `strings` 中的函数例子。注意他们都是包中的
	// 函数，不是字符串对象自身的方法，这意味着我们需要考
	// 虑在调用时将字符串作为第一个参数进行传递。
	p("Contains:  ", s.Contains("test", "es"))
	p("Count:     ", s.Count("test", "t"))
	p("HasPrefix: ", s.HasPrefix("test", "te"))
	p("HasSuffix: ", s.HasSuffix("test", "st"))
	p("Index:     ", s.Index("test", "e"))
	p("Join:      ", s.Join([]string{
    
    "a", "b"}, "-"))
	p("Repeat:    ", s.Repeat("a", 5))
	p("Replace:   ", s.Replace("foo", "o", "0", -1))
	p("Replace:   ", s.Replace("foo", "o", "0", 1))
	p("Split:     ", s.Split("a-b-c-d-e", "-"))
	p("ToLower:   ", s.ToLower("TEST"))
	p("ToUpper:   ", s.ToUpper("test"))
	p()

	// 虽然不是 `strings` 的一部分，但是仍然值得一提的是获
	// 取字符串长度和通过索引获取一个字符的机制。
	p("Len: ", len("hello"))
	p("Char:", "hello"[1])
}

[root@localhost test]# go run string-functions.go
Contains:   true
Count:      2
HasPrefix:  true
HasSuffix:  true
Index:      1
Join:       a-b
Repeat:     aaaaa
Replace:    f00
Replace:    f0o
Split:      [a b c d e]
ToLower:    test
ToUpper:    TEST

Len:  5
Char: 101
[root@localhost test]#