How to create an Empty Set in Ruby

How to create an Empty Set in Ruby ?

Answer

To create an empty set in Ruby, you can use the Set class from the Ruby standard library.


✐ Examples

1 Create Empty Set using Set Class

In this example,

  1. We require the 'set' library to access the Set class from the Ruby standard library.
  2. We create an empty set named empty_set using the Set.new constructor.
  3. The Set class in Ruby provides methods for set operations like adding elements, removing elements, and checking for membership.

Ruby Program

require 'set'

require 'set'

# Create an empty set
empty_set = Set.new

# empty_set is now ready to be used as an empty set

# Example usage:
# Add elements to the set
empty_set.add(5)

# Remove elements from the set
empty_set.delete(5)

# Check if an element is present in the set
contains_element = empty_set.include?(5)

puts "Is element 5 present in the set: #{contains_element}"

Output

Is element 5 present in the set: false

2 Create Empty Set using Set Literal

In this example,

  1. We can also create an empty set in Ruby using the literal notation Set[].
  2. This method provides a more concise way to create an empty set compared to using the Set.new constructor.
  3. We can manipulate the empty set using set operations such as adding elements, removing elements, and checking for membership.

Ruby Program

require 'set'

another_empty_set = Set[]

# another_empty_set is now ready to be used as an empty set

# Example usage:
# Add elements to the set
another_empty_set.add('apple')

# Remove elements from the set
another_empty_set.delete('apple')

# Check if an element is present in the set
contains_element = another_empty_set.include?('apple')

puts "Is element 'apple' present in the set: #{contains_element}"

Output

Is element 'apple' present in the set: false

Summary

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


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