Programming-Idioms

History of Idiom 78 > diff from v12 to v13

Edit summary for version 13 :

Version 12

2015-09-05, 13:10:25

Version 13

2015-09-05, 13:10:44

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 ()
dowhile c b = do a <- b
  if (c a) then dowhile c b else return ()

dowhile (/="END") getLine