[Haskell-beginners] Re: Iterating through a list of char...
hundalhh at yahoo.com
Thu Apr 29 08:46:14 EDT 2010
Here is a variation on Corentin's solution:
-- This function replaces every character that
-- follows an 'a' with 'A'
repA :: String -> String
repA s = zipWith f (' ':s) s where
f 'a' y = 'A'
f x y = y
> From: Jean-Nicolas Jolivet <jeannicolascocoa at gmail.com>
> I'm trying to iterate through each character of a string
> (that part I
> can do!) however, I need to apply a transformation to each
> character...based on the previous character in the string!
> This is the part I have no clue how to do!
> while i < my_string length:
> if my_string[i-1] == some_char:
> do something with
> do something else
> with my_string[i]
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