-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
$Bill Luebkert
Sent: Tuesday, May 02, 2006 5:42 PM
To: [email protected]
Subject: Re: Easy One
<snip: snippiness>
>> The original problem stated that the string
>> will have different numbers of alphabetic characters and numbers
while
>> your regex specifies 4 digits exactly.
> Easily remedied (I noted on it if they were exactly 4) this will
handle
> otherwise :
>
> if (/^(\D{1,4})(\d{1,4})$/) {
> print "alpha='$1' num='$2'\n";
> } else {
> print "Bad expr: $_\n";
> }
>
> The point is that it's just one if that does it all.
Hmm, you still might have a problem. What if there are two letters and
six numbers, or only two letters and four numbers?
We can use a zero-width lookahead assertion to make sure that there are
8 characters before the end of the string, like so:
########################
use strict;
use warnings;
no warnings qw(uninitialized);
my @str = ('AAAA1111','!!!!!!!!','ssdfs22222');
foreach my $str(@str){
print "\$str => $str\n";
if ($str =~ /^(?=.{8}$)(\D+)(\d+)$/){
print "\$1 => $1 \n\$2 => $2\n";
}else{
print "ERROR: Bad Expression!\n";
}
print "\n";
}
#########################
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