groups command on linux can be used to know which all groups a user belongs to Just type in groups on the terminal. Below is the output on my Mac machine staff everyone localaccounts _appserverusr admin The post Check all groups that current logged in user belong to on Linux appeared first on Welcome To Golang By Example ..read more

Overview In the Ruby language, strings “true” and “false” are interpreted as true when used in the if condition. See example below if "false" puts "yes" end Output "yes" “false” evaluates to true Therefore it becomes important to handle string “false” or string “true” correctly. We can create a custom method that can return boolean true or false based on the content of the string def true?(str) str.to_s.downcase == "true" end We can try out the above function true?("false") => false true?("true") => true Also, note that for strings other than “false” it will give true in ..read more

Overview Linux command ‘whoami’ can be used to know the currently logged-in user. Let’s see this command in action. Go to the terminal and type in the command whoami It will print the current user. Let’s say the current user is john then running the above command will simply print john Output whoami john The post Know the current user on Linux appeared first on Welcome To Golang By Example ..read more

Overview In this tutorial, we will see how to convert an array of ints or numbers to a string in Go. Below is the program for the same. Program Here is the program for the same. package main import ( "fmt" "strconv" ) func main() { sample := []int{2, 1, 3} output := "" for _, v := range sample { temp := strconv.Itoa(v) output = output + temp } fmt.Println(output) } Output 213 Note: Check out our Golang Advanced Tutorial. The tutorials in this series are elaborative and we have tried to cover all conc ..read more

Overview A simple regex can be used to check if a string contains single or multiple white spaces in Go. Here is the program for the same Program package main import ( "fmt" "regexp" ) func main() { //Single whitespace sampleWord := "Good morning" isWhitespacePresent := regexp.MustCompile(`\s`).MatchString(sampleWord) fmt.Println(isWhitespacePresent) //Multiple Whitespace sampleWord = "Good morning" isMultipleWhitespacePresent := regexp.MustCompile(`\s*`).MatchString(sampleWord) fmt.Println(isMultipleWhitesp ..read more

Overview Below is a simple way to initialize or create a string in Go. In the below program, we have simply declared as well as defined a string named sample Notice the syntax sample := "test" Here is the full program Program package main import "fmt" func main() { sample := "test" fmt.Println(sample) } Output test If we want to only declare a string variable then below is the way. A declared string is initialized to an empty string package main import "fmt" func main() { var sample string fmt.Println(sample) } Output Note: Check out our Golang Advanced Tuto ..read more

Overview Enum in Golang can be created by using IOTA. Please refer to this post to learn more about IOTA IOTA in Go (Golang) In this post, we will see how to convert an IOTA or enum to a string value. By default when you will print an IOTA or enum value it will print the integer part of it. See this example. Later we will see an example of we can define a custom toString method to print the string value of IOTA or enum Example package main import "fmt" type Size uint8 const ( small Size = iota medium large extraLarge ) func main() { fmt.Println(sm ..read more

Overview IOTA provides an automated way to create an enum in Golang. Let’s see an example. Example package main import "fmt" type Size uint8 const ( small Size = iota medium large extraLarge ) func main() { fmt.Println(small) fmt.Println(medium) fmt.Println(large) fmt.Println(extraLarge) } Output 0 1 2 3 In above program we created a new type type Size uint8 Then we declared some const of  type Size. The first constant small is set to iota so it will be set to zero small Size = iota That’s why fmt.Println(small ..read more

Sort a slice in Ascending order sort.Ints package of going can be used to sort a full slice or a part of the slice. It is going to sort the string into Ascending order. Below is the signature of the method https://pkg.go.dev/sort#Ints func Ints(x []int) It takes a slice ‘x’ as an argument and sorts the slice ‘x’ in place. Below is the program for the same package main import ( "fmt" "sort" ) func main() { nums := []int{3, 4, 2, 1} fmt.Printf("Before: %v", nums) sort.Ints(nums) fmt.Printf("\nAfter: %v", nums) } Output Before: [3 4 2 1] Aft ..read more

Overview strings.Repeat method can be used to repeat a string multiple times in Go (Golang) Here is the link to this function in the Go strings package https://pkg.go.dev/strings#Repeat Here is the signature of the method func Repeat(s string, count int) string The first argument is the original string and count is the number of times the strings needs to be repeated Program Here is the program for the same package main import ( "fmt" "strings" ) func main() { copy := strings.Repeat("a", 2) fmt.Println(copy) copy = strings.Repeat("abc", 3 ..read more