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 |