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Re: Regex to convert non-printable to printable char

by GlitchMr (Sexton)
on Aug 22, 2012 at 10:04 UTC ( #989002=note: print w/replies, xml ) Need Help??

in reply to Regex to convert non-printable to printable char

Just a note, \x7F is also unprintable character, In one of my scripts, I use following translation to filter non-printable characters.

tr[\0-\x1F\x7F] [\x{2400}-\x{241F}\x{2421}]

\x{2420} is space, in case you have noticed a gap in range. If you don't want to replace them with Unicode non-printable graphics characters, you could replace \x{2400}-\x{241F}\x{2421} with ? or \x{FFFD} (Unicode replacement character).

Also, in most cases you wouldn't want to match \x09 (tab), \x0A (line feed) or \x0D (carriage return). You could use this translation when you don't want to match them.

tr[\0-\x08\x0B\x0C\x0E-\x1F\x7F] [\x{2400}-\x{2408}\x{240B}\x{240C}\x{240E}-\x{241F}\x{2421}]

It also doesn't work on EBCDIC, if you want to match EBCDIC, most likely you will need different range of characters (\x00-\x3F\xFF).

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[LanX]: did you even go to the Dutch Perl Workshop in Utrecht?
[erix]: haha ok. I'm going to Glasgow though, and make a long road trip round the isles
[erix]: [Lanx} not the last time but the one before (there have been two)
[LanX]: when did you move to Utrecht, you used to live in a windmill on a dyke walking around in wooden shoes. ..
[LanX]: ... did you lie to me? OO
erix wouldn't mind a nice old windmill to live in... Mueller/Miller/ Molenaar

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