AskGolang

To list the content of a directory in Go, you can use the “os.ReadDir()”, “filepath.Walk()”, or “os.File.Readdir()” functions. Method 1: Using the os.ReadDir() function The ReadDir() function reads the named directory, returning all its directory entries sorted by filename. Syntax func ReadDir(name string) ([]DirEntry, error) Example package main import ( “fmt” “os” ) func main() { … Read more

To delete a key from a Map in Golang, you can use the “delete()” function. When you delete a key from a map, the deleted value is the key-value pair like a single entity. Syntax delete(map, key) Parameters It accepts map and key as arguments. map: The map from which you want to delete a … Read more

To format a string without printing in Go, you can use the “fmt.Sprintf()” function. The “fmt.Sprintf()” function accepts a format string and any number of arguments and returns a string formatted according to the format string. Example: Formatting a string without printing it in Go package main import ( “fmt” ) func main() { name … Read more

To check if a file exists in Golang, you can use the “Stat()” and “isNotExists()” functions from the os package. The os.Stat() function returns a FileInfo structure containing information about the file. If the file exists, os.Stat() function returns nil and no error; if the file does not exist, it returns an error. Syntax fileInfo, error := os.Stat(fileName) Parameters … Read more

To fix the “Type has no field or method” error in Go, “correct the field or method name to match the one defined in the type” or “create a method to access the unexported field”. The “Type has no field or method” error occurs in Go when you access a field or method that doesn’t … Read more

To parse command-line arguments in Go, you can use the “flag.Parse()” function. The flag package provides functions to define and parse command-line options with different data types, such as strings, integers, and booleans. Example package main import ( “flag” “fmt” ) func main() { // Define command-line flags name := flag.String(“name”, “Krunal Lathiya”, “Your name”) … Read more

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

To get the command-line arguments in Go, you can use the “os.Args” variable. The os.Args variable is a slice of strings that contains the command line arguments passed to the program. The first argument in the slice is the program’s name, and the remaining arguments are the values passed to the program. The os.Args[1:] represent other … Read more

The os.Lstat() function in Golang is “used to get information about a file, without following symbolic links”. It accepts the name as an argument and returns the fileinfo struct. Syntax func Lstat(name string) (FileInfo, error) Parameters name: It is the file or directory name for which you want to get the information.  Return value The Lstat() function … Read more