in reply to Re^2: Regex Question
in thread Regex Question

That won’t match the exact same things. The OP’s regex will replace the slash in "/2" or in "1/", yours won’t. Not sure if this is part of the spec, but it’s something to be aware of.

Meh. That’s it, I’m going back to bed.

Makeshifts last the longest.

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Re^4: Regex Question
by Roy Johnson (Monsignor) on Nov 15, 2005 at 20:23 UTC
    Mine does replace the slash when it has a digit on only one side. The logic is that the slash is replaced unless there is a digit on both sides. It is the OP's logic that will not replace a slash with a digit on either side. 
    for my $field ( map $_, 'C/O', '2/4', 'C/2', 'd/l', '2/', '/2') {
  print "$field...";
  $field =~ s/
    (?<!C(?=.O))   # Look back a character and make sure it's not C-so
+mething-O from there
    (?<!\d(?=.\d)) # Make sure it's also not a digit-something-digit
    (?:\\|\/)      # The something is a slash or backslash
  / & /xgi;   
  print "$field\n";
}

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Re^4: Regex Question
by shemp (Deacon) on Nov 15, 2005 at 20:07 UTC
    Yes, that would comply with my specification of the problem. If there is only a digit on one side, replace the slash with an ampersand.
    I use the most powerful debugger available: print!
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