why doesnt my regex doesnt matches certain character?

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

Replies are listed 'Best First'.
Re: why doesnt my regex match certain character? by Roy Johnson (Monsignor) on May 11, 2005 at 11:33 UTC
If ord is returning 0, it is a null, and you can represent the character as \0. Other characters can be represented by \### where the #s are octal digits. You can get the octal representation for some unknown $char by using `sprintf "%o", ord($char)` Caution: Contents may have been coded under pressure.	[reply] [d/l]
Re: why doesnt my regex doesnt matches certain character? by pelagic (Priest) on May 11, 2005 at 10:20 UTC
You must be more specific and show some example of your text and your code. Otherwise nobody will be able of helping you! pelagic	[reply]
Re^2: why doesnt my regex doesnt matches certain character? by Anonymous Monk on May 11, 2005 at 10:32 UTC
Hi Pelagic I cant copy the sample input. The character appears as ''. I want to match this character in my regex Thanks in advance A M Angelo	[reply]
Re^3: why doesnt my regex doesnt matches certain character? by thundergnat (Deacon) on May 11, 2005 at 10:51 UTC
Those are control characters of some type. That particular one is "Delete" - character \x7F. Assuming they are all the same, you can match against that. It might be better to match against a character class though, in case they vary. Try: `$text =~ /\p{Control}/;` to match, or `$text =~ s/\p{Control}//g;` to remove.	[reply] [d/l] [select]
Re^3: why doesnt my regex doesnt matches certain character? by Forsaken (Friar) on May 11, 2005 at 10:53 UTC
The trick is to determine the ascii value of the character. Once you have that you can take its octal value and use ie \035 to match for it, where /s/035/the octal value of that character/. An entirely different approach, although far less likely to work is to simply use . which will match 1 character, regardless of what it is. Ofcourse this depends very heavily on whether the text you're trying to match has a specific order or not. Remember rule one...	[reply]

Hi Pelagic