Sha256: 59e78fc8089598b8e71483e331e7deefdbf9075773c4bb0e052da5349b6f0285
Contents?: true
Size: 947 Bytes
Versions: 5
Compression:
Stored size: 947 Bytes
Contents
module Unitwise
module Expression
class Composer
attr_reader :terms
def initialize(terms)
@terms = terms
end
def set
@set ||= terms.reduce(SignedMultiset.new) do |s, t|
s.increment({f: t.factor, p: t.prefix, a: t.atom}, t.exponent); s
end
end
def numerator
@numerator ||= set.select{|k,v| v > 0}.map do |k,v|
"#{k[:f] if k[:f] != 1}#{k[:p]}#{k[:a]}#{v if v != 1}"
end.select{|t| !t.empty?}.join('.')
end
def denominator
@denominator ||= set.select{|k,v| v < 0}.map do |k,v|
"#{k[:f] if k[:f] != 1}#{k[:p]}#{k[:a]}#{-v if v != -1}"
end.select{|t| !t.empty?}.join('.')
end
def expression
@expression = []
@expression << (numerator.empty? ? '1' : numerator)
(@expression << denominator) unless denominator.empty?
@expression.join('/')
end
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems