Golang is one of the dominating languages in the IT world and it fixes the tasks of developers for different projects. The characteristics of the language make it one of the preferred languages for the timely completion of app development tasks. Go is the language conceptualized by Google and has similarities to C language. The intention was to create an open-sourced language that makes development for Golang developers quicker & easier.
Go is a unique language suited for web development and command-line interfaces that fits organizational needs. The Go developers are also using it for app development, operation & infrastructure, and others.
Do the Golang developers fear shifting of preferences to Go development? Simply put, Golang development is one of the simple procedures to get functional apps that support the business/organizational needs. The blog contains details of writing programs, coding in packages, and other relevant details to code efficiently in Golang.
Why Golang for Application Development?
Golang is preferred by developers for multiple reasons, but the main two reasons are – quick code compilation and faster string processing. The language also eases out the web app development activities for Go developers in simple terms. It is a statically typed language that reduces the expenses related to building applications and also assists with efficient linting. Hire Go developers able to develop applications to suit your web application development needs.
Let us look at the best reasons to select the Go language for development –
- It outperforms other languages and supports the running of multiple processes at one time. Go runs goroutines that support the appropriate use of memory resources.
- The statistically compiled language makes it an agile language that suits modern-day app development activities. Its execution time is low and different business apps can be incorporated for optimal business outcomes.
- Go has the backing of Google and was built for specific purposes in software development tasks. The open-source language can be used by both beginners & professional developers to start their web app development project.
- The websites developed through the Golang language are easy to maintain & modify. The execution time of Golang programming is low and it has suitable packages with built-in support.
Writing the First Program
The first task is to select a module path for compiling & running a simple program. It will be time to create a go.mod file as follows –
$ mkdir hello # Alternatively, clone it if it already exists in version control.
$ cd hello
$ go mod init example/user/hello
go: creating new go.mod: module example/user/hello
$ cat go.mod
module example/user/hello
go 1.16
$
Next, it will be the turn to create a file name ‘hello.go’ inside the directory containing the relevant Go code –
package main
import “fmt”
func main() {
fmt.Println(“Hello, world.”)
}
Now use the ‘go’ tool to build and install the program –
$ go install example/user/hello
$
The developers can also use the ‘go env’ command to set the default value for a variable environment to use the ‘go’ commands –
$ go env -w GOBIN=/somewhere/else/bin
$
It will be the best time to initialize the repository if you use a source control system. So add the files and also commit to the first change.
$ git init
Initialized empty Git repository in /home/user/hello/.git/
$ git add go.mod hello.go
$ git commit -m “initial commit”
[master (root-commit) 0b4507d] initial commit
1 file changed, 7 insertion(+)
create mode 100644 go.mod hello.go
$
How to Import Packages from the Module?
Now write a ‘morestrings’ package and then use it from the ‘hello’ program. Then develop a directory for the package named ‘$HOME/hello/morestrings’ and then the file name ‘reverse.go’ in the directory should be followed –
// Package morestrings implements additional functions to manipulate UTF-8
// encoded strings, beyond what is provided in the standard “strings” package.
package morestrings
// ReverseRunes returns its argument string reversed rune-wise left to right.
func ReverseRunes(s string) string {
r := []rune(s)
for i, j := 0, len(r)-1; i < len(r)/2; i, j = i+1, j-1 {
r[i], r[j] = r[j], r[i]
}
return string(r)
}
Test the package compiled with ‘go build’:
$ cd $HOME/hello/morestrings
$ go build
$
How to Code in Packages?
The data types are present relevant to packages and they consist of structs used in the development package. Also, create mutex locks on the specific local resources –
Type Data struct {
Size float64
Name string
Mu sync.Mutex
Cache map [string]string
}
Stay Aware of the Implementation of Middleware
One of the crucial tasks in Golang programming is the implementation of Middleware and different troubles coming with serving content can be handled swiftly with Middleware. Such typical web services allow the creation of pandemonium and thus complete the Go development tasks swiftly.
Func MyHandler (h * http.Handler) *http.Handler {
Return http.handlerFunc(func(w http.ResponseWriter, r *http.Request) {
Fmt.Println(“Doing job before calling actual handler”)
h.ServeHttp(w, r)
fmt.Println(“Doing job after calling actual handler”)
}]
}
The idea is to create a function that allows the acceptance of the handler function. With the use of custom authentication, return a request handler at the end. The code is mentioned below –
Func MyHandler (h *http.Handler) *http.Handler {
Return http.handlerFunc (func(w http.ResponseWriter , r *http.Request) {
fmt.Println (“Doing job before calling the actual handler”)
h.ServeHttp (w, r)
fmt.Println (“Doing job after calling the actual handler”)
})
}
The extra logic of the handlers is coded separately and the developers can modify the requests or the response object for all the basic stuff. Experts can also use the custom packages for coding easily available through downloads.
Final Thoughts!
The Go codes can be written with HTTP and also support the clients in making the relevant network calls. Also, developers can use & modify the code to measure the response time, modify the cookies, log the metrics of errors, and more. Take the help of Golang developers able to write the codes efficiently to develop website apps that support the latest requirements. Golang uses the coding tasks of developers and the right implementation results to complete complex projects timely. With simple effort, it becomes easy to understand and write the codes to perfection.