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  • #3399

Closed
Open
Opened Jul 27, 2009 by iago@trac-iago

Generalize the type of Data.List.{deleteBy, deleteFirstsBy}

Better (more general) type signatures would be

deleteBy :: (b -> a -> Bool) -> b -> [a] -> [a]
deleteFirstsBy :: (b -> a -> Bool) -> [b] -> [a] -> [a]

Example of why it is useful:

deleteBy ((==) . fst) 1 [(1,'a'), (2, 'b')]
Trac metadata
Trac field Value
Version 6.10.4
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component libraries/base
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture
Assignee
Assign to
8.2.1
Milestone
8.2.1 (Past due)
Assign milestone
Time tracking
None
Due date
None
Reference: ghc/ghc#3399