How to Check If Struct has Field in Golang

How to Check If Struct has Field in Golang

To check If Struct has a Field in Golang, you can use the combination of the “valueOf()” and “FieldByName()” functions. The reflect.ValueOf() function takes an interface value as an argument and returns a reflect.Value represents the concrete value stored in the interface. The FieldByName() is a method of the reflect.Value type that takes a string … Read more

How to Import Local Packages in Go

How to Import Local Packages in Go

To import local packages in Golang, “specify a relative or absolute path to the package directory”. Example mainproject/ main.go mainpackage/ mainmodule.go In this case, main.go is the main program file, and mainpackage is a local package that contains the mainmodule module. To import the mainpackage package in main.go, you can use the following import statement: … Read more

Anonymous Function in Golang

Anonymous Function in Golang

In Go, anonymous functions, function literals, or lambda functions are “functions without names that can be used as function values or closures”. To create an anonymous function in Golang, you can use the “func” keyword, followed by the “function parameters and return type” (if any), and the function body is enclosed in curly braces “{}”. … Read more

How to Get Relative Path in Golang

To get the relative path in Go, you can use the “filepath.Rel()” function. The “filepath.Rel()” function takes a base path and a target path and returns the relative path from the base to the target. Example package main import ( “fmt” “path/filepath” ) func main() { base := “/Users/krunallathiya/Desktop/Code/” target := “/Users/krunallathiya/Desktop/Code/pythonenv/env/data.txt” relativePath, err := … Read more

How to Convert Uint16 to String in Golang

How to Convert Uint16 to String in Golang

To convert a uint16 value to a string in Go, you can use the “strconv.FormatUint()” or “strconv.Itoa()” function. Method 1: Using the strconv.FormatUint() function The strconv.FormatUint() function converts unsigned integer values (e.g., uint, uint16, uint32, uint64) to strings. The FormatUint() function takes two arguments: the unsigned integer value (as uint64) and the base (radix) of … Read more

What is the strconv.FormatUint() Function in Golang

What is the strconv.FormatUint() Function in Golang

Golang strconv.FormatUint() function “converts unsigned integer values (e.g., uint, uint16, uint32, uint64) to strings”. The FormatUint() function takes two arguments: the unsigned integer value (as uint64) and the base (radix) of the number system to use for the string representation. Syntax func FormatUint(i uint64, base int) string Parameters “i” is the unsigned integer value of … Read more

What is the Escape Backtick in Go

What is the Escape Backtick in Go

In Go, you cannot directly include a “backtick character (`)” within a raw string literal, as raw string literals are enclosed in backticks and don’t support escape sequences. To include a backtick character in a string, you can use an interpreted string literal enclosed in double quotes (“) and concatenate it with raw string literals. … Read more

Golang raw string literals and Interpreted string literals

Golang raw string literals

Golang raw string literals “represent strings without any escape processing”. They are enclosed in backticks (`) and can span multiple lines. Raw string literals allow you to include any characters, including escape sequences (e.g., \n, \t), without processing them as special characters. Example package main func main() { multi_str := `This is a raw string … Read more

How to Fix go:linkname must refer to declared function or variable

How to Fix go-linkname must refer to declared function or variable

To fix the go:linkname must refer to declared function or variable error, you need to “update the golang.org/x/sys” package using this command: “go get -u golang.org/x/sys”. The go:linkname must refer to declared function or variable¬†error occurs in Golang when the name you provided in the directive does not conform to a declared function or variable … Read more