for (@arr) {
  $_ = uc;
}

[download]
That may be the "Perl way", but according to the Damian Conway-authored Perl Best Practices, a better way would be: 
for my $index (@arr) {
  $index = uc $index;
}

[download]

In reply to Re^2: pipe one function output to another by markkawika
in thread pipe one function output to another by bob_dobalina

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