[Haskell-cafe] map (-2) [1..5]
jupdike at gmail.com
Thu Aug 17 16:17:51 EDT 2006
> I'd also argue that in maths the necessary brackets are implied by the
> superscripting syntax
ASCII text parsing issues aside, in math,
-4 = ?
(No you cannot ask if there is space between the 4 and the - symbol,
or if I "meant" (-4)^2 or -(4^2), or if I wrote a negative sign or a
subtract sign. I believe there is only one standard interpretation
> they can only get in through the "back door" of evaluation
> which just doesn't seem right.
Constant folding can eliminate any runtime cost, so effectively 0 - 2
==> negative 2 at compile time. No problem.
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