Proposal: add dropPrefix to Data.List
I seem to have a copy of this function in everything I write sooner or later, so I'd like to propose its addition to Data.List. It strips a prefix from a list and, if successful, returns the tail. I often use it with pattern guards:
foo :: String -> IO ()
foo x
| Just y <- dropPrefix "foo=" = putStrLn ("foo is " ++ show y)
foo _ = putStrLn "Unknown"
but you can of course achieve the same by using case etc.
Let's try 11 July for a discussion deadline.
Trac metadata
Trac field | Value |
---|---|
Version | 6.6.1 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | libraries/base |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | Unknown |
Architecture | Unknown |