Re: stripping out ASCII chars using regexp?
From: Anno Siegel (anno4000_at_lublin.zrz.tu-berlin.de)
Date: 03/18/04
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Date: 18 Mar 2004 11:55:28 GMT
Greg <djbitchpimp@snowboard.com> wrote in comp.lang.perl.misc:
> I am trying to get rid of the ASCII chars from the end of a string
> that I download from a webpage using LWP::Simple. The script downloads
> the HTML from a webpage and then uses HTML::TableExtract to extract
> the information from specific tables on the page.
>
> This basically gives me a string like this:
>
> ���,Temper Tantrum�,Take Care Comb Your
> Hair�,,,CD�,23.56��,�,0 Days
> Ago�,Scotla�
>
> which I then split into an array using:
>
> my @line = split (',', $line) ;
>
> I then do a comparison on $line [6]:
>
> if ($line [6] >= 75) {
>
> ... do something
>
> When I run this using -w, I get the following error:
>
> Argument "15.99M- M- " isn't numeric in numeric ge (>=) at
> ./parse_wants.pl line 49.
You seem to be confused about what's in your string. With your
data, $line[ 6] is "23.56��", not "15.99M- M- ".
> This is because somehow some extended ASCII chars got in the end of
> the string. If I do:
Somehow? So they shouldn't be there and you don't know how they get
there?
That's a reason to check the logic where these elements are produced.
Fixing this by deleting the unwanted characters is nothing but band aid.
The bug remains.
[snip attempts]
> Can anyone figure out a way to get rid of these trailing ASCII
> characters using a regular expression?
The only correct way is not to pick them up from wherever they
come from.
Anno
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