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Perl regular expressions vs. RL, CFL, CSL

by gjb (Vicar)
on Jan 07, 2003 at 05:40 UTC ( #224866=note: print w/ replies, xml ) Need Help??

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  1. or download this
    { a^n b^n | n >= 0}
    
    ...
            (a*)
            (??{sprintf("b{%d}", (length($1)))})
           $/x
    
  2. or download this
    { a^n b^n c^n | n >= 0 }
    
    ...
            (??{sprintf("b{%d}", (length($1)))})
            (??{sprintf("c{%d}", (length($1)))})
           $/x
    

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