forM_ -package:ihaskell

forM_ is mapM_ with its arguments flipped. For a version that doesn't ignore the results see forM. forM_ is just like for_, but specialised to monadic actions.

O(n) Apply the monadic action to all elements of a vector and ignore the results. Equivalent to flip mapM_.

O(n) Apply the monadic action to all elements of a vector and ignore the results. Equivalent to flip mapM_.

O(n) Apply the monadic action to every element of the vector, discarding the results. It's the same as flip mapM_.

O(n) Apply the monadic action to every element of the vector, discarding the results. It's the same as flip mapM_.

O(n) Apply the monadic action to all elements of a vector and ignore the results. Equivalent to flip mapM_.

O(n) Apply the monadic action to every element of the vector, discarding the results. It's the same as flip mapM_.

O(n) Apply the monadic action to all elements of a vector and ignore the results. Equivalent to flip mapM_.

O(n) Apply the monadic action to every element of the vector, discarding the results. It's the same as flip mapM_.

O(n) Apply the monadic action to all elements of a vector and ignore the results. Equivalent to flip mapM_.

O(n) Apply the monadic action to every element of the vector, discarding the results. It's the same as flip mapM_.

form element or form attribute

forM_ is mapM_ with its arguments flipped. For a version that doesn't ignore the results see forM. As of base 4.8.0.0, forM_ is just for_, specialized to Monad.

Synonym for oforM_

forM_ is mapM_ with its arguments flipped. For a version that doesn't ignore its results, see forM.

Like forM_, but applying the function to the individual list items in parallel.

O(n) Apply the monadic action to all elements of a vector and ignore the results. Equivalent to flip mapM_.

O(n) Apply the monadic action to all elements of a vector and ignore the results. Equivalent to flip mapM_.

O(n) Apply the monadic action to all elements of a vector and ignore the results. Equivalent to flip mapM_.

O(n) Apply the monadic action to all elements of a vector and ignore the results. Equivalent to flip mapM_.

O(n) Apply the monadic action to all elements of a vector and ignore the results. Equivalent to flip mapM_.

Just like mapM_, except with flipped arguments.

Examples

Here is a common way of iterating N times using a for loop in an imperative language with mutation being an obvious side effect:

>>> import Data.Massiv.Array as A

>>> import Data.IORef

>>> ref <- newIORef 0 :: IO (IORef Int)

>>> A.forM_ (range Seq (Ix1 0) 1000) $ \ i -> modifyIORef' ref (+i)

>>> readIORef ref
499500

forM_ is mapM_ with its arguments flipped. For a version that doesn't ignore the results see forM.

Same as mapM_ with arguments flipped