| Safe Haskell | Safe |
|---|---|
| Language | Haskell98 |
Algebra.RealIntegral
Description
Generally before using quot and rem, think twice.
In most cases divMod and friends are the right choice,
because they fulfill more of the wanted properties.
On some systems quot and rem are more efficient
and if you only use positive numbers, you may be happy with them.
But we cannot warrant the efficiency advantage.
See also: Daan Leijen: Division and Modulus for Computer Scientists http://www.cs.uu.nl/%7Edaan/download/papers/divmodnote-letter.pdf, http://www.haskell.org/pipermail/haskell-cafe/2007-August/030394.html
Documentation
class (C a, C a, Ord a, C a) => C a where Source #
Remember that divMod does not specify exactly what a should be,
mainly because there is no sensible way to define it in general.
For an instance of quot bAlgebra.RealIntegral.C a,
it is expected that a will round towards 0 and
quot ba will round towards minus infinity.div b
Minimal definition: nothing required