trying elm

trying-elm.elm

foo = 10
((-) foo 1)
((-) 1 foo)

-- derived type
-- cmd1 : a -> number
cmd1 = \op -> ((-) foo 1)

cmd1 (-1) -- 9

-- derived type. 
-- do not understand how this came up ?
-- am i doing this right ?
-- expected cmd2 to be a infix version of cmd1 which is infix
-- cmd2 : (number -> number' -> a) -> a
cmd2 = \op -> (1 `op` foo)

-- does not work
-- TYPE MISMATCH --------------------------------------------- repl-temp-000.elm
-- You are giving 2 arguments to something that is not a function!
-- 5|                1 op foo)
--                     ^^^^^^
-- Maybe you forgot some parentheses? Or a comma?
-- cmd3 = \op -> (1 op foo)