To read a JSON file in Go, you can use the “json.Unmarshal()” function from the “encoding/json” package. JSON is a popular data format that is easy to read and write. It is often used to represent configuration and environment variables because it is a human-readable format that developers can easily understand. JSON files are also easy … Read more
Go Mod() function is “used to find the modulus or remainder from the floating-point division of the two arguments (x/y)”. Syntax func Mod(x, y float64) float64 Parameters The Mod() function takes two arguments of type float64: x: It represents the numerator in the division that will take place to find the remainder. y: It represents the … Read more
To create an empty slice in Golang, you can use the “empty pair of square brackets” or “make()” function. Method 1: Using a literal syntax with empty brackets Use a literal syntax with empty brackets to create an empty slice in Go. You need to use the := operator and an empty pair of square brackets … Read more
To check if a slice contains an element in Golang, you can use either the “slice.Contains()” function or “for loop”. Method 1: Using the slice.Contains() function Starting with version 1.18, Go introduces a new function called a slice.Contains() that checks if a slice contains a specific element. Syntax func Contains[E comparable](s []E, v E) bool Parameters … Read more
To pass the default parameter to a function in Golang, you can use a “variadic function”, “struct with a default value”, or “map with a default value”. Method 1: Using a variadic function A variadic is a function that accepts a variable number of arguments. In Go, you can define a variadic function using the … syntax … Read more
To find an absolute value in Golang, you can use the “math.Abs()” function. The math.Abs() is a built-in function “used to find the absolute value of any given number”. Syntax math.Abs(input) Parameters input: It is a floating point value of type float64. Return value The Abs() function returns a floating point value of type float64. If … Read more
To generate a random boolean value in Golang, you can use the “Intn()” function from the math/rand package. The “rand.Intn()” function in Go is used to generate a random integer in the range [0,n). It panics if n <= 0. Example 1: Use the rand.Intn() function package main import ( “fmt” “math/rand” “time” ) func … Read more
UUID stands for Universally Unique Identifier. It is a 128-bit value used for a unique identification Foundation. UUIDs provide uniqueness as it generates ids based on time, cursor movement, and system hardware (MAC, etc.). To generate UUID in Golang, you can use the “exec.Command(‘uuidgen’)” or “uuid.New()” method from the UUID package. Method 1: Using exec.Command() … Read more
Global variables in Go are “declared outside of any function and accessible from any function within the same package”. Global variables are often used to store data shared by multiple functions. For example, a global variable can store the user’s name or the current time. Changing the value of the global variable inside any function … Read more
Fatal error: all goroutines are asleep – deadlock! error occurs in Go when “all goroutines in your program are blocked, and none can proceed“. This can happen for several reasons, such as: A goroutine is waiting for a channel to receive data, but there is no other goroutine sending data to that channel. A goroutine is … Read more