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This can be made even simpler. Remember that if a character is listed in a tr/// searchlist more than once, only the first occurance is meaningful. This means you can do something like:
$string =~ tr/\n\000-\037/\n/d;
(Note I'm using octal here). This specifies that the newline character is replaced by itself, while everything else in that range is deleted.

There are three advantages to this method: <NL>

  • It's (IMHO) cleaner and easier to read.
  • It's easier to modify, e.g. to exempt additional characters from being deleted.
  • It doesn't care what character is used for newline on the current platform. For example, I seem to remember that \n and \r have their meanings reversed on one platform (Macintosh?) because the platform standard is to use CR for line breaks. </NL>

    In reply to Re: Re: Range of chars except one by kjherron
    in thread Range of chars except one by Marcello

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