in reply to regex question

you also don't escape characters in a character class. your regex (once g is added for global) will strip back slash characters, as well as braces. i.e. should be: 
$var =~ s/[()]//g;

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the hardest line to type correctly is: stty erase ^H

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Re^2: regex question
by Perl Mouse (Chaplain) on Oct 27, 2005 at 15:09 UTC
    you also don't escape characters in a character class. your regex (once g is added for global) will strip back slash characters, as well as braces.
    No, it doesn't. There's no need to escape the parens, but it certainly doesn't do any harm: 
    $_ = 'foo\bar(baz)'; print "Before: '$_'; ";
s/[\(\)]//g;         print "After: '$_'\n";
__END__
Before: 'foo\bar(baz)'; After: 'foo\barbaz'

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    No backslashes are removed.
    Perl --((8:>*
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Re^2: regex question
by sauoq (Abbot) on Oct 27, 2005 at 22:58 UTC
    you also don't escape characters in a character class.

    That's not very good advice. Sometimes you certainly do need to escape characters in a character class. Take the following for example: 

    $ perl -le '$_ = q/f!o@o#b$a%r^b&a*z/; s/[!@#$%^&*]//g; print'

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    -sauoq
"My two cents aren't worth a dime.";
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[d/l]
      Or, even more drastical, see the difference in these lines:
      perl -e '$_="bjzu-sbtz -abnzo-tbhze-rb zp-ebrzl- bhza-cbkze-r\n";s/[b-z]//g;print'
      vs.
      perl -e '$_="bjzu-sbtz -abnzo-tbhze-rb zp-ebrzl- bhza-cbkze-r\n";s/[b\-z]//g;print'
      s$$([},&%#}/&/]+}%&{})*;#$&&s&&$^X.($'^"%]=\&(|?*{%
      +.+=%;.#_}\&"^"-+%*).}%:##%}={~=~:.")&e&&s""`$''`"e
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Re^2: regex question
by Juerd (Abbot) on Oct 27, 2005 at 19:02 UTC

    the hardest line to type correctly is: stty erase ^H

    Type it as: stty erase ^V^H

    Update: I missed the point, which was that you cannot backspace if backspace isn't set correctly.

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