I think you want something like: (import List)
stringContains s = any (s `isPrefixOf`) . tails
then we get: Prelude List> stringContains "hello" "hell" False Prelude List> stringContains "hello" "hello" True Prelude List> stringContains "llo" "hello" True -- Hal Daume III | hdaume@isi.edu "Arrest this man, he talks in maths." | www.isi.edu/~hdaume On Thu, 8 May 2003, sashan wrote:
Dean Herington wrote:
On Thu, 8 May 2003, sashan wrote:
Hi
I've written a function that checks for a substring in a given string. This seems like a common thing to do and was wondering if there is a function that does this in one of the standard modules.
stringContains :: String -> String -> Bool stringContains _ [] = True stringContains [] _ = False stringContains (h:t) (h1:t1) = if h == h1 then stringContains t t1 else stringContains t (h1:t1)
Do you intend the following behavior?
*Main> "x.y.z" `stringContains` "xyz" True
Nope
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