Thanks, it make sense here. However, like I want to choose s[1,3,6,10] or something like this. Are there some straightforward function or operator for doing this job? The !! operator in haskell seems does not support multiple indecies. Hank Stefan O wrote:
On Thu, Nov 30, 2006 at 05:47:43PM -0800, Huazhi (Hank) Gong wrote:
Like given a string list s="This is the string I want to test", I want to get the substring. In ruby or other language, it's simple like s[2..10], but how to do it in Haskell?
Use take and drop, from the Prelude:
(ghci session) Prelude> "Hello world" "Hello world" Prelude> drop 3 "Hello world" "lo world" Prelude> take 7 (drop 3 "Hello world") "lo worl" Prelude> _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
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