Hire Top 1% Remote Golang Developers and Engineers in 24 hrs

A string literal is a string constant formed by a single character or  concatenating a sequence of characters. There are two types of string literals - Raw string literals and Interpreted string literals. 

Raw string literals are the uninterrupted sequence of characters placed between backticks. For example, `UltraGenius`.

Interpreted string literals are the sequence of characters placed within double quotations. For example, "Welcome to UltraGenius".

Slice is a lightweight data structure used for storing homogeneous data with a sequence of variable length. Slice has three components- 

• Pointer - A pointer points to the first array element which is accessible through slice. The element is not necessarily to be the first element.
• Length - Length represents the total number of elements present in the slice.
• Capacity - It represents the capacity up to which the slice can expand.

Goroutines provide the way of executing tasks concurrently with other tasks in the same address space. Goroutines can communicate using the channels which are especially designed to prevent race conditions when the memory is being accessed. The main Goroutine must run in order to run any other Goroutine.

Type Switch is used to check the data type of a variable at run-time. Each Switch contains minimum one case which behaves as a conditional statement and a default case which is executed if none of the mentioned conditions is true.

A Go channel is a way of communication used by Goroutines to exchange data. When freelance Golang developers have multiple Goroutines running concurrently, then Go channels become the most efficient mechanism for communication. Freelance Go developers often use them for notifications and managing concurrency in the program.

The chan keyword is used for creating a channel. A channel can transfer only the same type of data from the same channel, different type of data is not permissible. The channel can also be created using the make() function with a shorthand declaration.

The make() function creates a generic channel, map, or slice values. It returns general type value and not a pointer value. While the new() function works for all types and allocates memory for the variable dynamically at run-time, initializes to zero value, and returns a pointer value to it. 

Golang provides a special feature called anonymous function which has the ability to form closures. A closure is an anonymous function in which the reference variables are declared outside the function. It is similar to accessing the global variables outside the function.

For example, 

package main 

import "fmt"

func main(){

UG:=0

count:=func() int{

UG+=1

return UG

}

fmt.Println(count())

fmt.Println(count())

The output of the program will be - 

1

2

One of the unique features of Golang is that it provides automated package testing with custom testing suites. For creating a new testing suite, create a file with _test.go extension that contains a TestXyz function, where Xyz is replaced with the name of the feature which is to be tested. 

After that, place the testing suite file in the same package in which the file needs to be tested is present. The test file does not run during normal execution but  will run only when you execute go test command.

If you are trying to hire a Golang Developer. Here is the Golang Developer Job Description that you can use in your hiring.