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# Yet another match error

- Date: Thu, 17 Aug 1995 08:55:02 PDT
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    I don't know if this error was already posted here as I do not read MOO Cows.
    If it was, I apologise but nevertheless state that this error is quite serious,
    especially to someone like myself who use regular expressions a lot.

    ;substitute("%1+%2+%3+%4",match("me as A guy in the mood for maths","^%(.+%) +%(in +%([^ ]+%) +%)?as +%(.*%)$"))
    => "me+as A guy in the +t+A guy in the mood for maths"

    Now, I thought this was fishy, look at the same in Perl:

    $_="me as A guy in the mood for maths";
    print "$1+$2+$3+$4" if /^(.+) +(in +([^ ]+) +)?as +(.*)$/;

    Result: me+++A guy in the mood for maths

    A little strange how %(in +%([^ ]+%) +%)? matched 'as A guy in the ' and the
    inner parenthesis matched 't'...

    --
                                     |\_/|
                                     |@ @|
     ,-------------------------vvvV--<o o>--Vvvv---------------------------------.
     |           Rui Mendes           V"V                                        |
     |      azuki@s700.uminho.pt            Any sufficiently advanced technology |
     |  http://s700.uminho.pt/~azuki          is indistinguishable from magic.   |
     |      Finger me for PGP key                     Arthur C. Clarke           |
     `---------------------------------------------------------------------------'

    $x=<<EOF;$x=~s/./$x{$&}++;$&/ge;%x=map{$_,$c++}sort{$x{$b}<=>$x{$a}}keys%x;$x=~s/./for(1..$x{$&}){vec($v,$n++,1)=1;}$n++;/ge;print$v;
    12212224314112411111212111314353112411123221312141111121111142213121411331111121111232111331133232213121411321
    EOF

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