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If you are looking for a solution for the current production version of Perl 5, please check out
the Perl 5 tutorial.
=title Calling a function during assignment
The same can be used with functions so instead of writing
my $lower = min($lower, $new_value);
you can write
$lower min= $new_value;
my $lower = 2;
$lower min= 3;
say $lower; # 2
$lower min= 1;
say $lower; # 1
This should even work with the comma operator effectively pusing more
values on an array but it is not yet implemented in Rakudo
my @a = (1, 2, 3);
@a ,= 4;
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Written by Gabor Szabo