Re: [Haskell-cafe] Section Syntax Errors

On Sat, 11 Nov 2006, David House wrote:

On 11/11/06, Aditya Siram wrote:

...

subOne :: [Integer] -> [Integer] subOne = map (- 1)

The short answer is that this is interpreted as negative unity, rather than a section of binary minus. There are two common workarounds:

subOne = map (subtract 1) subOne = map (+ (-1))

There's a whole minefield of opinions on whether this is the right syntax or not. I'm sure you could google through the archives to research this a bit more.

E.g. this thread http://www.haskell.org/pipermail/haskell-cafe/2006-August/017403.html continued here: http://www.haskell.org/pipermail/haskell-cafe/2006-September/017941.html