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Go Programming Articles
Page 82 of 86
How to check if a string starts with a specified Prefix string in Golang?
The HasPrefix() function of string class in Golang is used to check whether a given string begins with a specified Prefix string or not. It returns True if the given string begins with the specified prefix string; otherwise it returns False.Syntaxfunc HasPrefix(s, prefix string) boolWhere x is the given string. It returns a Boolean value.ExampleIn this example, we are going to use HasPrefix() along with an if condition to check wheter the two defined variables are starting with the same Prefix string or not.package main import ( "fmt" "strings" ) func main() { // Initializing ...
Read MoreHow to use the Fields() function in Golang?
The strings package of Golang provides a Fields() method, which can be used to split a string around one or more instances of consecutive whitespace characters.The Fields() function splits a given string into substrings by removing any space characters, including newlines. And it treats multiple consecutive spaces as a single space.Syntaxfunc Fields(s string) []stringWhere s is the string parameter.ExampleLet us consider the following example −package main import ( "fmt" "strings" ) func main() { // Initializing the Strings string1 := " The Golang Programming Language " // Display the Strings fmt.Println("Input String:", string1) ...
Read MoreWhat is the EqualFold function in Golang?
The EqualFold() function in Golang is an inbuilt function of strings package which is used to check whether the given strings (UTF-8 strings) are equal. The comparison is not case-sensitive. It accepts two string parameters and returns True if both the strings are equal under Unicode case-folding (i.e., case-insensitive), False otherwise.Syntaxfunc EqualFold(s, t string) boolWhere s and t are strings. It returns a Boolean value.ExampleThe following example demonstrates how to use EqualFold() in a Go program −package main import ( "fmt" "strings" ) func main() { // Intializing the Strings R := "Welcome to Tutorialspoint" ...
Read MoreHow to count the number of repeated characters in a Golang String?
Count() is a built-in function is Golang that can be used to count the number of non-overlapping instances of a character/string in a string.Syntaxfunc Count(s, sep string) intWhere, s – Original Stringsep – Substring which we want to count.It returns an Integer value.ExampleThe following example demonstrates how you can use the Count() function in a Go program.package main import ( "fmt" "strings" ) func main() { // Initializing the Strings x := "Golang Programming Language" y := "Language" // Display the Strings fmt.Println("First String:", x) fmt.Println("Second String:", y) ...
Read MoreHow to use Contains() function in Golang?
Golang has a set of built-in string functions that we can utilize to perform different types of operations on string data. Contains() is such a function that can be used to search whether a particular text/string/character is present in a given string. If the text/string/character is present in the given string, then it returns True; else it returns False.Syntaxfunc Contains(s, substr string) boolWhere, s is the original string and substr is the string which is to be checked with the original string.ExampleThe following example demonstrates how Contains() works −package main // importing fmt and strings import ( "fmt" ...
Read MoreHow to split a string in Golang?
Splitting a string means being able to get a part of a string, and that part can either be based on a position or a character in the string.In Go, if we want to split a string on the basis of positions, we can make use of the [ ] (square brackets) and then pass the indices in them separated by a colon.SyntaxConsider the syntax shown below.sl[startingIndex : EndingIndex]It should be noted that the element at the EndingIndex in the slice won't be considered, as the range is from startingIndex to (EndingIndex−1).Example 1Now, let's consider an example where we will ...
Read MoreHow to handle errors within WaitGroups in Golang?
There are chances that we might get some panic while running multiple goroutines. To deal with such a scenario, we can use a combination of channel and waitgroups to handle the error successfully and not to exit the process.Let's suppose there's a function that when invoked returns a panic, which will automatically kill the execution of the program, as when panic gets called it internally calls os.Exit() function. We want to make sure that this panic doesn't close the program, and for that, we will create a channel that will store the error and then we can use that later ...
Read MoreHow to wait for a goroutine to finish in Golang?
We know that goroutines can be a bit tricky at first, and often we find cases where the main goroutines will exit without giving a chance to the inside goroutines to execute.In order to be able to run the goroutines until the finish, we can either make use of a channel that will act as a blocker or we can use waitGroups that Go's sync package provides us with.Let's first explore a case where we have a single goroutines that we want to finish and then do some other work.Example 1Consider the code shown below.package main import ( "fmt" ...
Read MoreHow to concatenate two slices in Golang?
Whenever we talk about appending elements to a slice, we know that we need to use the append() function that takes a slice as the first argument and the values that we want to append as the next argument.The syntax looks something like this.sl = append(sl, 1)Instead of appending a single number to the slice "sl", we can append multiple values in the same command as well.Consider the snippet shown below.sl = append(sl, 1, 2, 3, 4)The above code will work fine in Go.When it comes to appending a slice to another slice, we need to use the variadic function ...
Read MoreSorting in Golang with sort Package
The standard library of Golang provides a package that we can use if we want to sort arrays, slices, or even custom types. In this article, we will discover three main functions that we can use if we want to sort a slice in Golang. We will also see how we can create a custom sort function and custom comparator.Let's first check how we can sort a slice of integer, float64 and string values.ExampleConsider the code shown below.package main import ( "fmt" "sort" ) func main() { integerSlice := []int{3, 2, 14, 9, 11} sort.Ints(integerSlice) ...
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