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Re^4: Using Look-ahead and Look-behind

by JohnN (Initiate)
on Oct 15, 2012 at 15:09 UTC ( #999100=note: print w/ replies, xml ) Need Help??

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  1. or download this
    /CCGG          # Match starting at DNA sequence CCGG
      (          
    ...
      )          
      AATT         # and ending at AATT
    /x;
    
  2. or download this
    /CCGG   
      (          
    ...
       )         
      AATT  # and ending at AATT
    /x;
    
  3. or download this
    /CCGG   
      (          
    ...
      )         # 
      AATT  # 
    /x;
    

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