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Perl/Basics/Variables and Data Types/Casting

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Casting is the process of transitioning from one data type to another. This is typically done using curly brackets {} preceeded by a data type designator ($,%, or @).

  • To cast a hash reference back to a hash:
my %hash;
my $hashref = \%hash; #create the hash reference
my %casted  = %{$hashref}; #Cast back to a hash.
  • To cast a list of keys in a hash into an array:
my @casted = @{keys %hash};
  • To cast a scalar value to an integer:
my $integer = int($scalar);