Re: Regex matching on grid alignment

 x  x  x  x
 1  2  3  4
(.) \1 \1
   (.) \1 \1
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 x  x  x  x  x  x
 1  2  3  4  5  6
(.) \1 \1          #r1
   (.) \1 \1       #r2
      (.) \1 \1    #r3 
         (.) \1 \1 #r4
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6 length - 3 consecutive = 3 leading

...(.)\1\1
..(.)\1\1.
.(.)\1\1..
(.)\1\1...
(.)\1\1(.)\1\1
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So m{(.)\1\1(.)\1\1 |(.)\1\1... |.(.)\1\1.. |..(.)\1\1. |...(.)\1\1 }x

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Re^2: Regex matching on grid alignment by Anonymous Monk on Sep 08, 2013 at 21:47 UTC
Actually it needs branch-reset , which I remember from Finding repeat sequences., so like `m{ (?\| (.)\1\1(.)\1\1 \|(.)\1\1... \|.(.)\1\1.. \|..(.)\1\1. \|...(.)\1\1 ){4} ## 6 x 4 }x;` [download] Generating (and testing) this regex left up to the OP (hopefully you can see the relation between the various numbers)	[reply] [d/l]
Re^3: Regex matching on grid alignment by Anonymous Monk on Sep 08, 2013 at 22:56 UTC
:) perl before 5.10 (before branch reset available ) would need () counting like (.)\1\1(.)\2\2 \|(.)\3\3... \|.(.)\4\4.. \|..(.)\5\5. \|...(.)\6\6	[reply]