How to Copy Array into Another Array in Go

To copy an array into another array in Golang, you can use the built-in “copy()” function. However, arrays have a fixed length, and if you want to copy arrays with different sizes, consider using slices. Example 1 package main import “fmt” func main() { // Declare and initialize an array sourceArray := [5]int{1, 2, 3, … Read more

How to Convert String to Rune in Go

To convert a string to a rune in Golang, you can use the “type conversion”. A rune is an alias for the int32 type and represents a Unicode code point. Syntax []rune(s) Example package main import ( “fmt” ) func main() { // Define a string s := “Hi, Golang!” // Convert the string to … Read more

How to Convert String to Float in Golang

To convert a string to float in Go, you can use the “strconv.ParseFloat()” function. The string.ParseFloat() method “accepts decimal and hexadecimal floating-point number syntax”. If the string is well-formed and near a valid floating-point number, the “ParseFloat()” function returns the nearest floating-point number rounded using IEEE754 unbiased rounding. Syntax func ParseFloat(s string, bitSize int) (float64, … Read more

How to Convert JSON to CSV in Golang

You can convert JSON data to CSV using the “encoding/json” and “encoding/csv” packages. First, you will need to unmarshal the JSON data into a suitable data structure (like a slice of structs or a slice of maps), and then you can write that data to a CSV file using the csv.Writer type. Example package main … Read more

What is the Scope of Variables in Go

The scope of a variable in Go refers to the part of the code where the variable is accessible. Variables can have different scopes depending on where they are declared. Block scope A variable declared within a block (e.g., inside a function, loop, or conditional statement) has a block scope. Therefore, it is accessible only … Read more

Variables in Golang: How to Use Go Variables

Golang variables are explicitly declared and used by the compiler to check the type-correctness of function calls. Variable is the name given to the memory location to store the value of a particular type. There are numerous syntaxes to declare variables in go. A variable is a storage location with a particular type and an … Read more

Golang Encryption Decryption: How to Create AES Encryption

What is Encryption Encryption is the process of converting the plaintext to ciphertext. In simpler terms, encryption takes readable data and alters it to appear random. Encryption requires an encryption key: a set of mathematical values that both the sender and the receiver of the encrypted message know. If you have seen the movie Imitation … Read more

How to Make HTTP Requests in Golang

To make HTTP requests in Go, you can use the “net/http” package from the standard library. Making GET requests To make a GET request, you can use the “http.Get” function. The function takes a URL as an argument and returns an HTTP response and an error. Example package main import ( “fmt” “io/ioutil” “log” “net/http” … Read more

Golang Command-line Flags

Go command-line flags can be handled using the “flag” package, which allows you to parse and define command-line arguments and flags easily. Example package main import ( “flag” “fmt” ) func main() { // Define flags name := flag.String(“name”, “Krunal Lathiya”, “Your name”) age := flag.Int(“age”, 30, “Your age”) active := flag.Bool(“active”, true, “Are you active?”) … Read more