In Haskell, how do you check whether a string is a substring of another?

Question

I'm using Data.Text and all I could find are find , which only takes a Char as predicate, and breakOn , which would allow me to do what I want but seems overkill. Surely there must be a better way?

I'd be interested in the answer to the same question with other string libraries as well (String, ByteString, etc.).

Answer 1

刚刚找到它，答案是isInfixOf 。