[Haskell-cafe] Re: [] vs [()]

[Jon Fairbairn]

"Daryoush Mehrtash" <dmehrtash at gmail.com> writes:

> What is the difference between empty list [] and list with one unit
> element [()]?


   Prelude> :m + Data.List
   Prelude Data.List> []\\[()]
   []

or, for completeness, the difference between a list with one
unit element and the empty list:

   Prelude Data.List> [()]\\[]
   [()]

:-P

-- 
Jón Fairbairn                                 Jon.Fairbairn at cl.cam.ac.uk