Ticket #2042 (closed proposal: wontfix)
Add concatMapM to Control.Monad
| Reported by: | twanvl | Owned by: | |
|---|---|---|---|
| Priority: | normal | Milestone: | Not GHC |
| Component: | libraries/base | Version: | 6.8.2 |
| Keywords: | Cc: | ||
| Operating System: | Unknown/Multiple | Architecture: | Unknown/Multiple |
| Type of failure: | Difficulty: | Unknown | |
| Test Case: | Blocked By: | ||
| Blocking: | Related Tickets: |
Description
I have written this function over and over again for different projects. Time to add it to the base libraries:
-- | The 'concatMapM' function generalizes 'concatMap' to arbitrary monads. concatMapM :: (Monad m) => (a -> m [b]) -> [a] -> m [b] concatMapM f xs = liftM concat (mapM f xs)
Attachments
-
concatMapM.patch
(7.7 KB) - added by twanvl
4 years ago.
- darcs patch
Change History
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