string - Position of a sublist in a list haskell -


OK, I am trying to write a function that determines the position of a string if the first one Say the suburbs of "Pie" is like a string and someone else like "Apple" will return to function 5, because the first letter of "pie" is in string "apple" on position 5

Can anybody do this?

See the question it was told a few days ago (and answered) and your problem

My solution:

  findStr :: string - & gt; String - & gt; Maybe int findStr pat str = findStrHelp pat str 0 where findStrHelp _ [] _ ​​= nothing FindStrHelp pat s @ (x: xs) n | Pat == (le (length pat) s) = bus n | Otherwise = Search SRTLP Pat XS (N + 1)  

To get this code without possibly getting, just remove the findStrHelp _ [] _ ​​ and With just n , n can also be with typing sign int .


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