Demo of passing a "dynamic variable" to a template".

#!/usr/bin/perl use strict; use warnings; use Template; my $tt = Template->new; $tt->process(\*DATA, { rand => sub { rand } }) or die $tt->error; __END__ A Random number: [% rand %]
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A more complex example where the dynamic variable works on a list.

#!/usr/bin/perl use strict; use warnings; use Template; use List::Util 'shuffle'; my $tt = Template->new; my @a = (1 .. 10); $tt->process(\*DATA, { shuffle => sub { shuffle @{$_[0]} }, arr => \@a }) or die $tt->error; __END__ [% arr.join(':') %] [% shuffle(arr).join(':') %]
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The last example reworked to use a custom vmethod.

#!/usr/bin/perl use strict; use warnings; use Template; use List::Util 'shuffle'; no warnings 'once'; # turn off annoying error $Template::Stash::LIST_OPS->{ shuffle } = sub { my $list = shift; return [ shuffle @$list ]; }; my $tt = Template->new; my @a = (1 .. 10); $tt->process(\*DATA, { arr => \@a }) or die $tt->error; __END__ [% arr.join(':') %] [% arr.shuffle.join(':') %]
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