TWC254

Challenge Link

Task1

First one is a math trick that we use to find out if a number is a power of 3 or not:

#!/usr/bin/env perl
use strict;
use warnings;

sub three_power{
  $_[0] == int($_[0]**(1/3))**3
}

printf "%d\n",three_power(27);
printf "%d\n",three_power(0);
printf "%d\n",three_power(6);

Task2

We reverse the list of vowels and replace them in the string, and capitalize the first letter:

#!/usr/bin/env perl
use strict;
use warnings;

sub reverse_vowels{
  my ($str) = @_;
  my @vowels = $str =~ /[aeiou]/gi;
  $str =~ s/([aeiou])/pop @vowels/egi;
  ucfirst $str
}

printf "%s\n",reverse_vowels('Raku');
printf "%s\n",reverse_vowels('Perl');
printf "%s\n",reverse_vowels('Julia');
printf "%s\n",reverse_vowels('Uiua');