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

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How to create an Empty Set in Perl ?

Answer

In Perl, you can create an empty set using hash references or by using the Set::Object module.

✐ Examples

1 Create Empty Set using Hash Reference

In this example,

We declare a hash reference %empty_set to represent an empty set in Perl.
Hashes in Perl can be used to simulate sets, where the keys represent the elements of the set.
We can perform set operations such as adding elements, removing elements, and checking for membership by manipulating the hash reference.

Perl Program

# Create an empty set using hash reference
my %empty_set = ();

# Example usage:
# Add elements to the set
$empty_set{'apple'} = 1;

# Remove elements from the set
delete $empty_set{'apple'};

# Check if an element is present in the set
my $contains_element = exists $empty_set{'apple'};

print "Is element 'apple' present in the set: $contains_element\n";

Output

Is element 'apple' present in the set:

2 Create Empty Set using Set::Object Module

In this example,

We can also use the Set::Object module to create an empty set in Perl.
This module provides an object-oriented interface to sets, allowing for set operations such as adding elements, removing elements, and checking for membership.
We need to install the Set::Object module if not already installed and then use it in our Perl script.

Perl Program

# Example of using Set::Object to create an empty set
use Set::Object;

# Create an empty set using Set::Object
my $empty_set = Set::Object->new();

# Example usage:
# Add elements to the set
$empty_set->insert('apple');

# Remove elements from the set
$empty_set->remove('apple');

# Check if an element is present in the set
my $contains_element = $empty_set->contains('apple');

print "Is element 'apple' present in the set: $contains_element\n";

Output

Is element 'apple' present in the set: 0

Summary

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

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