String Manipulation in Go

Introduction

The strings package in Golang provides many useful string-related functions. This lab aims to test your understanding of some of these functions.

Skills Graph

String Functions

Complete the code below to print the output of various string functions provided by the strings package.

• Use the strings package to complete the lab.
• Use the fmt.Println function to print the output.
• Do not modify the function name or parameters.

$ 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

There is the full code below:

// The standard library's `strings` package provides many
// useful string-related functions. Here are some examples
// to give you a sense of the package.

package main

import (
	"fmt"
	s "strings"
)

// We alias `fmt.Println` to a shorter name as we'll use
// it a lot below.
var p = fmt.Println

func main() {

	// Here's a sample of the functions available in
	// `strings`. Since these are functions from the
	// package, not methods on the string object itself,
	// we need pass the string in question as the first
	// argument to the function. You can find more
	// functions in the [`strings`](https://pkg.go.dev/strings)
	// package docs.
	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"))
}

Summary

This lab tests your understanding of the strings package in Golang. You should be able to use the various functions provided by the package to manipulate strings.