Re: show only numbers before, within or after the text

On Jun 29, 1:18 am, lucavi...@xxxxxxxxxxxx (Luca Villa) wrote:
I have a long text file like this:

324yellow
34house
black
54532
15m21red56
44dfdsf8sfd23

How can I obtain (Perl - Windows/commandline/singleline) the
following?

1) only the numbers at the beginning before some alpha text, like
this:

324
34
15
44


Just for fun - ie ignoring prettiness and requirements 2) and 3):

my @stuff = qw(324yellow 34house black 54532 15m21red56
44dfdsf8sfd23);
for(@stuff) {
$x = $_ * 1;
if($x == 0 && substr($_, 0, 1) ne "0") {$x = undef}
if($x eq $_) {$x = undef}
print $x, "\n" if defined $x;
}

Cheers,
Rob

.

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