Can anyone suggest a more linear course of action?
Not me. I can suggest something stupid though.
My pet toy at the moment, genexes.
(Generating regex strings with a regex)
#!/usr/bin/perl -wl
use strict;
use re "eval";
my @array = (
[ 'a', 'b', 'c' ],
[ 1, 2 ],
['x', 'y', 'z'],
[7, 8, 9]
);
my $re;
map {
$re .= "(\n".
'((?{$^R."' . join('"})|(?{$^R."', @$_) . qq'"}))\n';
} @array;
$re .= ")?" x @array;
$re .= '(?{ push @_, $^R })(?!)';
print $re;
''=~/$re/x;
print for(grep defined($_), @_);
__END__
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