diff options
Diffstat (limited to 'Cmd.hs')
| -rw-r--r-- | Cmd.hs | 6 |
1 files changed, 6 insertions, 0 deletions
@@ -7,4 +7,10 @@ data Cmd = Cmd String String (State -> IO ()) instance Show Cmd where show (Cmd a b _) = a ++ " - " ++ b +cmdGet :: String -> [Cmd] -> Maybe Cmd +cmdGet x commands = + let command = [ (Cmd a b c) | (Cmd a b c) <- commands, a == x ] + in if length command == 0 + then Nothing + else Just (head command) |
