To print the values of slices, you can use the fmt.Println() function. The fmt.Println() function prints one or more values, followed by a newline, to the standard output. Here is an example of how to create a slice, take a sub-slice, and print the values of the original slice and its sub-slice. package main import … Read more
To iterate the fields of a struct in Golang, you can use the reflect package’s ValueOf() function to iterate over the fields of a struct. package main import ( “fmt” “reflect” ) type Student struct { Name string Rollno int City string } func iterateStructFields(input interface{}) { value := reflect.ValueOf(input) numFields := value.NumField() fmt.Printf(“Number of … Read more
To get the number of characters in a string in Golang, you can use utf8.RuneCountInString() function from the unicode/utf8 package. This function correctly handles multi-byte characters (e.g., non-ASCII characters) encoded using UTF-8. Example package main import ( “fmt” “unicode/utf8” ) func main() { input := “Yello, 世界!” numOfRunes := utf8.RuneCountInString(input) fmt.Printf(“The number of characters in … Read more
To split a string on whitespace characters (spaces, tabs, and newlines) in Go, you can use the strings.Fields() function from the strings package. package main import ( “fmt” “strings” ) func main() { input := “This is John Wick” words := strings.Fields(input) fmt.Println(“Words in the input string:”) for i, word := range words { fmt.Printf(“Word … Read more
In Go, you cannot directly declare a map as a constant because maps are reference types, and their contents are mutable. However, you can achieve a similar effect by creating a function that returns a map and using it as a read-only map. package main import “fmt” func main() { readOnlyMap := GetReadOnlyMap() value, ok … Read more
To initialize an Array in Golang, you can use an array literal. An array literal is a sequence of values enclosed in curly braces {} and separated by commas. When initializing an array, you need to specify the type and the size of the array. Example package main import ( “fmt” ) func main() { … Read more
To check if a string contains a substring in Golang, you can use the strings.Contains() function from the strings package. Example package main import ( “fmt” “strings” ) func main() { str := “Hello, Go is awesome!” substr := “Go” if strings.Contains(str, substr) { fmt.Printf(“String ‘%s’ contains the substring ‘%s’.\n”, str, substr) } else { … Read more
To check if a variable is a nil in Go, you can use the == comparison operator. The nil value is zero for pointers, functions, interfaces, maps, slices, and channels. When a variable of these types is not initialized, its value is nil. Example Here’s an example demonstrating how to check for nil values in Go. … Read more
Go does not support default parameters directly. However, there are two methods you can use indirectly to pass the default parameter in the function. Method 1: Using a variadic function Method 2: Using a struct with a default value Method 1: Using a variadic function A variadic is a function that accepts a variable number of … Read more
To join an array of strings into a single string in Go, you must convert an array to a slice using [:] and then use the strings.Join() function to join the slice elements into a single string. package main import ( “fmt” “strings” ) func main() { // Define an array of strings wordsArray := … Read more