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 > > -- View this message in context: http://www.nabble.com/How-to-get-subset-of-a-list--tf2735647.html#a7632145 Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com. _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
