How to mark lines with the first 10 characters duplicated
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 Good Afternoon. How to mark lines with the just first 10 characters duplicated 
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 Sorry, but is not understandable to me. Can you provide an example? 
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 @Ekopalypse 
 1234567890;Example1;100
 1234 ;Example2;200
 1233334554;Example3;300
 1234567890;Example7;700
 I need to mark the line 1 and 4.
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 @Jose-Emilio-Osorio said in How to mark lines with the first 10 characters duplicated: I assume that the first 10 characters are always digits and can be any combination? 
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 @Ekopalypse 
 Can be any combination
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 Is it important that we keep the lines as it is or can we sort the document first? 
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 @Ekopalypse 
 The document is sorted by the first 10 characters.
 I want to mark the lines first to check them, and then delete
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 @Ekopalypse said in How to mark lines with the first 10 characters duplicated: (.{10}).*\R\1 Thank you very much. It works. 
 Last question: How could I delete the line duplicated ? For example just the line 4
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 if it is not important which line gets deleted we could use find what: (.{10}).*\R(?=\1)
 replace with is empty
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 @Ekopalypse said in How to mark lines with the first 10 characters duplicated: (.{10}).*\R(?=\1) Thank you very much. 
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 @Jose-Emilio-Osorio 
 If there are more two lines duplicated, can I use this regex ?
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 1234567890;Example1;100 1234 ;Example2;200 1233334554;Example3;300 1234567890;Example7;700 I need to mark the line 1 and 4. The document is sorted by the first 10 characters. Hmmm, not seeing the document as being sorted… what am I missing? 
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 @Jose-Emilio-Osorio said in How to mark lines with the first 10 characters duplicated: If there are more two lines duplicated, can I use this regex ? Yes, I guess so. 
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 maybe just a copy/paste before the sorting took place. 


