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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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