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

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.


More Ruby Sets Tutorials

  1. How to create an Empty Set in Ruby ?
  2. How to Get Length of a Set in Ruby ?
  3. How to create a Set of size N in Ruby ?
  4. How to create a Set of Numbers from 1 to N in Ruby ?
  5. How to create a Set of integers in Ruby ?
  6. How to create a Set of Strings in Ruby ?
  7. How to Access Items in a Set in Ruby ?
  8. How to get a Random Item in a Set in Ruby ?
  9. How to Iterate Over a Set in Ruby ?
  10. How to check if a Set is Empty in Ruby ?
  11. How to check if a Set is Not Empty in Ruby ?
  12. How to get Subset from a Set in Ruby ?
  13. How to check if a Specific Item is present in the Set in Ruby ?
  14. How to check if a Set contains all the items of Another Set in Ruby ?
  15. How to Sort Items of a Set in Ruby ?
  16. How to Copy a Set in Ruby ?
  17. How to add an Item to a Set in Ruby ?
  18. How to find Union of Two Sets in Ruby ?
  19. How to find Intersection of Two Sets in Ruby ?
  20. How to check if Two Sets are Equal in Ruby ?
  21. How to Convert a Set of Integers to a Set of Strings in Ruby ?
  22. How to Convert a Set of Strings to a Set of Integers in Ruby ?
  23. How to Convert a Set of Floats to a Set of Strings in Ruby ?
  24. How to Convert a Set of Strings to a Set of Floats in Ruby ?
  25. How to Filter Items of a Set based on a Condition in Ruby ?
  26. How to Remove Specific Item from a Set in Ruby ?
  27. How to Remove Items from Set based on a Condition in Ruby ?
  28. How to create a Set of Sets in Ruby ?