Logo

Programming-Idioms

History of Idiom 78 > diff from v10 to v11

Edit summary for version 11 by :
↷

Version 10

2015-09-05, 13:08:43

Version 11

2015-09-05, 13:09:28

Idiom #78 "do while" loop

Execute a block once, then execute it again as long as boolean condition c is true.

Idiom #78 "do while" loop

Execute a block once, then execute it again as long as boolean condition c is true.

Code 
dowhile :: (a -> Bool) -> IO a -> IO ()
dowhile c b = do a <- b
  if (c a) then dowhile c b else return ()

dowhile (/="END") getLine
Code 
dowhile :: (a -> Bool) -> IO a -> IO a
dowhile c b = do a <- b
  if (c a) then dowhile c b else return a

dowhile (/="END") getLine