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Feature #4667 » 0001-documentation-for-the-mathn-library.patch

jasondew (Jason Dew), 05/13/2011 05:55 AM

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lib/mathn.rb
##
# = mathn
#
# mathn.rb -
# $Release Version: 0.5 $
# $Revision: 1.1.1.1.4.1 $
# by Keiju ISHITSUKA(SHL Japan Inc.)
# mathn is a library for changing the way Ruby does math.
#
# --
# == Usage
#
# To start using this library, simply:
#
# require "mathn"
#
# This will change the way division works for Fixnums, specifically
#
# 3 / 2
#
# will return (3/2) instead of the usual 1.
#
# == Copyright
#
# Author: Keiju ISHITSUKA(SHL Japan Inc.)
#
# --
# $Release Version: 0.5 $
# $Revision: 1.1.1.1.4.1 $
require "cmath.rb"
require "matrix.rb"
......
alias power! ** unless method_defined? :power!
##
# exponentiate by +other+
def ** (other)
if self < 0 && other.round != other
Complex(self, 0.0) ** other
......
alias power! ** unless method_defined? :power!
##
# exponentiate by +other+
def ** (other)
if self < 0 && other.round != other
Complex(self, 0.0) ** other
......
module Math
remove_method(:sqrt)
##
# compute the square root of +a+
def sqrt(a)
if a.kind_of?(Complex)
abs = sqrt(a.real*a.real + a.imag*a.imag)
......
end
end
def rsqrt(a)
def rsqrt(a) # :nodoc:
if a.kind_of?(Float)
sqrt!(a)
elsif a.kind_of?(Rational)
......
class Float
alias power! **
##
# exponentiate by +other+
def ** (other)
if self < 0 && other.round != other
Complex(self, 0.0) ** other
(2-2/3)