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 |