Function(3)

✨ Function(3) ✨

okay so bestie — this is a page from the User Contributed Perl Documentation collection, and it's about a lil module called Tie::Function. Strap in, it's short but it's iconic. 🎀

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🌸 NAME 🌸

Tie::Function — wrap functions in tied hash sugar 💅

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✨ SYNOPSIS AND EXAMPLE ✨

like, here's the whole vibe, right up front:

use Tie::Function 0.01;
tie my %a, Tie::Function => sub{join '_'x$_[0],qw/( | )/};
print "small: $a{1}\nmedium: $a{2}\nwide: $a{3}\n";
# we split on $; to recover multiple arguments
tie my %times, Tie::Function => sub{
      $_[0] * $_[1]
};
print "3 times 5 is $times{3,5}\n"

the way that comment in there is doing the lord's work — we split on $; to recover multiple arguments. iykyk 🫶

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🦋 DESCRIPTION 🦋

Tie::Function simplifies wrapping functions in tied hash syntax so they can be interpolated in double-quoted literals without messy intermediate variables. no more temp vars cluttering up your whole life, periodt. 😭

Here's how I use it the most:

use HTML::Entities;
use Tie::Function;
tie my %Entitize => 'Tie::Function' => \&encode_entities;
...
print <<EOF;
<em>$Entitize{$somethingaboutsomething}</em><br>
<textarea name="something"
cols="60" rows="10">$Entitize{$something}</textarea>
EOF
...

see how the heredoc just... slurps it up?? that's the whole point bestie 💖

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🎀 EXPORT 🎀

nothing 🫥

fr fr, nothing. it exports nothing. don't @ me.

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💜 HISTORY 💜

0.02

relaxed stricture, turned off warnings to silence "split on unitialized value" warning 🤫

0.01

initial version 🌱

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👑 AUTHOR 👑

Copyright (C) 2004,2005 david nicol davidnico@cpan.org released under your choice of the GNU Public or Artistic licenses 📜

two whole licenses, your choice, very generous of him, we love that. 🫶

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🌈 SEE ALSO 🌈

• perltie
• Tie::OneOff
• Interpolation
• Tie::Filter
• overload

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and that's the whole page, bestie. this one shipped with perl v5.42.0 on 2025-07-25, and yeah, it's Function(3) 💅✨ go forth and tie your hashes, you got this. 🦋🎀💖