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Re^3: RegEx + vs. {1,}

by grizzley (Chaplain)
on Oct 10, 2012 at 15:11 UTC ( #998239=note: print w/ replies, xml ) Need Help??

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  1. or download this
    $x = "abcdefgxxabcdefgzzabcdsjfhkdfab"; $len=int(length($x)/2);
    while($x !~ /(\w{2,})(.*?\1){$len}/)
      { $len-- };
    $x =~ /(\w{2,})(.*?\1){$len}/; # 'strange line'
    print $1
    
  2. or download this
    $ perl -le '$x = "abcdefgxxabcdefgzzabcdsjfhkdfab"; $len=int(length($x
    +)/2); $restring = join"|", map {"(?:.*?\\1){$_}"} reverse(1..$len); p
    +rint $restring; print $1 if $x =~ /(\w{2,})($restring)/;'
    
    (?:.*?\1){15}|(?:.*?\1){14}|(?:.*?\1){13}|(?:.*?\1){12}|(?:.*?\1){11}|
    +(?:.*?\1){10}|(?:.*?\1){9}|(?:.*?\1){8}|(?:.*?\1){7}|(?:.*?\1){6}|(?:
    +.*?\1){5}|(?:.*?\1){4}|(?:.*?\1){3}|(?:.*?\1){2}|(?:.*?\1){1}
    abcdefg
    

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