Can I have a go? :)

First up, nice and short:

$a .= ".pl";
then of course there's the ever faithful:
$a = "$a.pl";
then of course we could get a little tricky:
$a = pack("A*A*",$a,".pl");
or just plain ridiculous:
my $x = sub {return shift() . shift()}; $a = &$x($a,".pl");
and onto the sublime:
$a=~s#$#.pl#;
rdfield

In reply to Re: Appending characters to an existing string by rdfield
in thread Appending characters to an existing string by wolverina

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