regex - Matching lines with negative lookbehind for character string -


I am trying to match those lines that do not start with "jays_", which is a negative look -Behind uses. Why do not I have work? 

  (? Lt ;! (Zzz _)) \ w +

<

Look forward to something that you 

  ^ (?! Zzz _) \ w +   
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      ^  regex anchor at the beginning of the string 
     
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      (?! Zzz _)  Negative Look Up If it does not start then check is not done by  zzz _ , then with the remaining pattern, 
     
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     < <>>   Code> (? & Lt;! (Zzz _)) \ w +   
     
     
      zzz_asdf  
     
     From me Can be targeted, but the case is now starting from the first character from the right to left 
     
      zzz_asdf | (? & Lt;! Zzz_asdf) The beginning of the beginning of the back is right because the beginning of the string is not introduced by zzz_, so this remainder pattern has come with zzz_asdf. \ W zzz_asdf | \ W and by the end  
     
     
     If you still want to look backwards, you can write something 
     
      ^ .. .. (? & Lt;! Zzz _) \ w +

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