Re: matching numeric range

[jimbojones]

Hi

I think a hash is the answer. Assuming the second 2 elements of your data (delimited by the ':') don't involve the range, you could do something like:

my %checks = (
               '123:C' => [ 'A[0-7]' ],
               '456:D' => [ 'B[8-9]', 'B1[0-5]' ]
             );

while ( <DATA>)
{
 chomp;
 my $check = $_;

 my $matches = 0;
 #-- get the trailing key
 my $first_part = "";
 my $key = "";
 if ( $check =~ /(\w+):(\w+:\w+)$/ )
 {
  $first_part = $1;
  $key = $2;
 }

 #-- look up key in our checks hash
 foreach my $match_pattern ( @{$checks{$key}} )
 {
  if ( $first_part =~ /$match_pattern/ )
  {
   print "Line $_ matches $match_pattern:$key\n";
   $matches = 1;
  }
 }
 print "Line $_ doesn't match\n" unless ( $matches );
}

__DATA__
A4:123:C
B8:456:D
B11:456:D
X11:456:D

Results

Line A4:123:C matches A[0-7]:123:C
Line B8:456:D matches B[8-9]:456:D
Line B11:456:D matches B1[0-5]:456:D
Line X11:456:D doesn't match

-j

[state-o-dis-array]

I'm liking this. One question on this. Is there a simple way (one line regex substitution for example) to get from B10-15 to B1[0-5], or B120-125 to B12[0-5]? Actually, as I think about it, I may need to apply some logic to handle B18-24. Can you think of a good way to handle this one?

[jimbojones]

Hi
the B10-15 example is easy: B1[0-5] (character class), as is B120-125 (B12[0-5]). As you say, logic spanning B18-24 is more difficult; that's why I broke it into 2 regexs in my post above. It was easier to match B1[8-9] or B2[0-4] than to try some regex-fu. You may be more adept with regexes than I am.
- j
update: escape out [ ] so they're visible.