How to create an Empty Set in Go - Step by Step Examples

How to create an Empty Set in Go ?

Answer

To create an empty set in Go, you can use a map with keys of the desired type and boolean values.


✐ Examples

1 Create an Empty Set Using a Map

In this example,

  1. In Go, there is no built-in set type, so we use a map to create a set-like data structure. The keys of the map represent the elements of the set, and the values are typically set to true.
  2. We declare a variable named set1 and assign it an empty map using the make function. The keys of this map are of type string and the values are of type bool.
  3. We then print the set1 to the console to verify its contents. An empty map in Go is represented as map[].

Go Program

package main

import "fmt"

func main() {
    set1 := make(map[string]bool)
    fmt.Println("Contents of set1:", set1)
}

Output

Contents of set1: map[]

2 Create an Empty Set and Add Elements

In this example,

  1. We use a map to create a set-like data structure. The keys of the map will represent the elements of the set.
  2. We declare a variable named set2 and assign it an empty map using the make function. The keys of this map are of type string and the values are of type bool.
  3. We add elements to set2 by setting the keys to the desired values and the values to true. For example, we add the strings "apple" and "banana".
  4. We then print the set2 to the console to verify its contents. The map will show the keys we added with values of true.

Go Program

package main

import "fmt"

func main() {
    set2 := make(map[string]bool)
    set2["apple"] = true
    set2["banana"] = true
    fmt.Println("Contents of set2:", set2)
}

Output

Contents of set2: map[apple:true banana:true]

Summary

In this tutorial, we learned How to create an Empty Set in Go language with well detailed examples.


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