#!/usr/bin/env -S perl
 
#use warnings;      # suppress uninitialized warnings
use strict;
use feature qw{ say };
use experimental qw( signatures );


$_ = 'abXXXXacVVVVVad';
#$_ = 'abacad';

my $lim = 7;
say "Examining \'$_\' $lim times";
say "/a(.)/";
if (/a(.)/g) {

#say "/q(.)/";          # switch to see no-match example
#if (/q(.)/g) {

    say "\$1: $1";
    say "\$&: $&";
} else {
    say 'No match';
}

for my $try (1 .. $lim) {
    say "//";
    if (//g) {
        say "\$1: $1";
        say "\$&: $&";
    } else {
        say 'No match';
    }
}

$_ = '37.5BBBBB98UUUUU4.075QQQQQ42TTTT0.357SSS';
$lim = 5;
say "\nExamining \'$_\' $lim times";
say '/[^\d.](\d+(?:\.?\d*)?)/g';
if (/[^\d.](\d+(?:\.?\d*)?)/g) {
    say "\$1: $1";
    say "\$&: $&";
} else {
    say 'No match';
}

for my $try (1..$lim) {
    say "//";
    if (//g) {
        say "\$1: $1";
        say "\$&: $&";
    } else {
        say 'No match';
    }
}

exit(0);
__END__