Book Image

Hands-On Go Programming

By : Tarik Guney
Book Image

Hands-On Go Programming

By: Tarik Guney

Overview of this book

<p>With its C-like speed, simplicity, and power for a growing number of system-level programming domains, Go has become increasingly popular among programmers. Hands-On Go Programming teaches you the Go programming by solving commonly faced problems with the help of recipes. You will start by installing Go binaries and get familiar with the tools used for developing an application. Once you have understood these tasks, you will be able to manipulate strings and use them in built-in function constructs to create a complex value from two floating-point values. You will discover how to perform an arithmetic operation date and time, along with parsing them from string values. In addition to this, you will cover concurrency in Go, performing various web programming tasks, implementing system programming, reading and writing files, and honing many fundamental Go programming skills such as proper error handling and logging, among others. Whether you are an expert programmer or newbie, this book helps you understand how various answers are programmed in the Go language.</p>
Table of Contents (18 chapters)
Title Page
Copyright and Credits
Packt Upsell
Contributor
Preface
Index

Replacing parts of a string


In this section, we're going to see how we can quickly replace a part of a string with another value. When it comes to string manipulation in Go language, you will find a lot of utility methods under the strings package. Herein, we are going to use the same package for replacing a part of the string with another value. Let's go back to our editor and see how we can commence this process.

So, I'm going to have a helloWorld variable and we're going to replace World with Mars. Check the following code:

package main
import (
 "strings"
 "fmt"
)
func main(){
 helloWorld := "Hello, World"
 helloMars := strings.Replace(helloWorld, "World", "Mars", 1)
 fmt.Println(helloMars)
}

The following screenshot will explain the code that we just looked at:

 

As shown in the screenshot, we're going to use strings package and it has a  replace function and it accepts the variable that we're going to search as the first parameter, which is Hello,  World. The old string would be the things...