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Posted by Ralph Noble on October 7, 2004, 8:47 pm
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Folks ... I have a pipe-delimited ASCII text file with a lot of
different non-printing characters. Rather than try and figure out all
the non-printing characters that exist in this 17+ million record
database, I was hoping someone might have already written a script or
know of a module they'd be willing to share that would remove all
non-printing characters from an ASCII file?
Thanks,
Ralph Noble
ralph_noble@hotmail.com
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Posted by Jürgen Exner on October 8, 2004, 5:19 am
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Ralph Noble wrote:
> Folks ... I have a pipe-delimited ASCII text file with a lot of
> different non-printing characters. Rather than try and figure out all
> the non-printing characters that exist in this 17+ million record
> database, I was hoping someone might have already written a script or
> know of a module they'd be willing to share that would remove all
> non-printing characters from an ASCII file?
Oh my, that's difficult. you need one whole command:
s/[:^print:]//g;
Further details see "perldoc perlre", section " The POSIX character class
syntax".
Reading the file and writing back the modified text is left as an exercise.
jue
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Posted by Brian McCauley on October 8, 2004, 7:30 pm
Please log in for more thread options Jürgen Exner wrote:
> s/[:^print:]//g;
Surely you mean
s/[^[:print:]]+//g;
> Further details see "perldoc perlre", section " The POSIX character class
> syntax".
Right back at you J! :-)
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Posted by Jürgen Exner on October 8, 2004, 7:47 pm
Please log in for more thread options Brian McCauley wrote:
> Jürgen Exner wrote:
>
>> s/[:^print:]//g;
>
> Surely you mean
>
> s/[^[:print:]]+//g;
>
>> Further details see "perldoc perlre", section " The POSIX character
>> class syntax".
>
> Right back at you J! :-)
Hmmmm, indeed ;-((
jue
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Posted by Brian McCauley on October 8, 2004, 7:22 pm
Please log in for more thread options Ralph Noble wrote:
> Folks ... I have a pipe-delimited ASCII text file with a lot of
> different non-printing characters. Rather than try and figure out all
> the non-printing characters that exist in this 17+ million record
> database, I was hoping someone might have already written a script or
> know of a module they'd be willing to share that would remove all
> non-printing characters from an ASCII file?
perl -pe 's/[[:cntrl:]]+//g'
(Note this removes all nonprinting characters including the linebreaks
too - is that really what you wanted?)
perl -lpe 's/[[:cntrl:]]+//g'
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