Name: purescript-precise
Owner: PureScript Contrib
Description: A huge number library for Purescript with emphasis on correctness.
Forked from: Thimoteus/purescript-hugenums
Created: 2016-11-08 11:42:16.0
Updated: 2018-05-10 19:43:51.0
Pushed: 2018-05-08 11:25:45.0
Homepage: null
Size: 45
Language: PureScript
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This is a library for working with numbers of arbitrarily finite size.
JavaScript (and to some extension PureScript) has quite a few drawbacks when it comes to large numbers. For example, PureScript's Int primitive is a member of the Bounded typeclass, with top == 2 ^ 31 - 1 and bottom == - (2 ^ 32).
The PureScript Number primitive is not Bounded in the same way; however, there are problems with manipulating large-enough Numbers:
port Prelude
t x = 900000000000000000.0
x
er
+ 1.0 == x
+ 1.0
00000000000000
In this library, correctness is prioritized above all else:
port Data.HugeNum
t x = fromNumber 900000000000000000.0
t y = fromNumber 1.0
+ y == x
e
+ y
Num 900000000000000001.0
Addition is implemented using an elementary-school method. Multiplication follows Karatsuba.
r install purescript-precise
Module documentation is published on Pursuit.