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Programming-Idioms

History of Idiom 78 > diff from v14 to v15

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Version 14

2015-09-05, 13:11:18

Version 15

2015-09-05, 13:12:08

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

dowhile (/="END") getLine