How to create a Set of Strings in Perl - Step by Step Examples

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How to create a Set of Strings in Perl ?

Answer

In Perl, you can use a hash to create a collection of unique strings.

✐ Examples

1 Create Set of Strings in Perl

In this example,

We create a new hash named %stringSet to store strings.
We add strings to the hash as keys with a dummy value, such as 1.
The resulting hash contains unique strings as keys.

Perl Program

# Create a hash of strings
my %stringSet;

# Add strings to the hash
$stringSet{'Apple'} = 1;
$stringSet{'Banana'} = 1;
$stringSet{'Cherry'} = 1;

# Print the hash
use Data::Dumper;
print Dumper(\%stringSet);

Output

$VAR1 = {
          'Banana' => 1,
          'Apple' => 1,
          'Cherry' => 1
        };

2 Check if Set Contains a String

In this example,

We use the exists function to check if a specific key exists in the hash.
The exists function returns true if the key exists, otherwise false.

Perl Program

# Check if the hash contains a key
my $containsBanana = exists $stringSet{'Banana'};
print "Hash contains Banana: $containsBanana\n";

Summary

In this tutorial, we learned How to create a Set of Strings in Perl language with well detailed examples.

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