golang插入字符串,如何在Golang的字符串中每X个字符插入一个字符？

Aim: to insert a character every x characters in a string in Golang

Input: helloworldhelloworldhelloworld

Expected Output: hello-world-hello-world-hello-world

Attempts

Attempt one

package main

import (

"fmt"

"strings"

)

func main() {

s := "helloworldhelloworldhelloworld"

s = strings.Replace(s, "world", ",", -1)

fmt.Println(s)

}

results in: hello,hello,hello,

Attempt two

Count number of characters

For loop

If X=5 then insert a -

Attempt three

Scan combined with join

Problem

The reason that attempts two and three do not contain code snippets at the moment is that I am still thinking what approach should be used to insert a character every X characters in a string in Golang.

解决方案

This function just inserts '-' each Nth element

func insertNth(s string,n int) string {

var buffer bytes.Buffer

var n_1 = n - 1

var l_1 = len(s) - 1

for i,rune := range s {

buffer.WriteRune(rune)

if i % n == n_1 && i != l_1 {

buffer.WriteRune('-')

}

}

return buffer.String()

}