Created
December 18, 2012 08:47
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require 'date' | |
require 'time' | |
require 'active_support/all' | |
p_inf = 1.0 / 0.0 | |
n_inf = -1.0 / 0.0 | |
module InfiniteComparable | |
extend ActiveSupport::Concern | |
included do | |
class_exec do | |
alias_method :old_comp, :<=> | |
remove_method :<=> | |
end | |
end | |
def <=> (other) | |
conversion = :"to_#{self.class.name.downcase}" | |
if other.respond_to?(:infinite?) && other.infinite? | |
-other.infinite? | |
elsif other.respond_to?(conversion) | |
old_comp other.send(conversion) | |
else | |
old_comp other | |
end | |
end | |
end | |
module FloatInfiniteComparable | |
extend ActiveSupport::Concern | |
included do | |
class_exec do | |
alias_method :old_comp, :<=> | |
remove_method :<=> | |
end | |
end | |
def <=>(other) | |
return old_comp(other) if other.class == self.class | |
return 0 if other.respond_to?(:infinite?) && infinite? && infinite? == other.infinite? | |
infinite? || old_comp(other) | |
end | |
end | |
class Date | |
include InfiniteComparable | |
end | |
class DateTime | |
include InfiniteComparable | |
end | |
class Time | |
include InfiniteComparable | |
end | |
class BigDecimal | |
include FloatInfiniteComparable | |
end | |
class Float | |
include FloatInfiniteComparable | |
end | |
p 1.0 <=> 10.0 | |
p Float::INFINITY <=> Float::INFINITY | |
p -Float::INFINITY <=> -Float::INFINITY | |
p -Float::INFINITY <=> Float::INFINITY | |
p Float::INFINITY <=> -Float::INFINITY | |
p (1.0...10.0).include?((1.0...10.0)) | |
time_zone = ActiveSupport::TimeZone['Eastern Time (US & Canada)'] | |
time = Time.now | |
date = Date.today | |
datetime = DateTime.now | |
twz = ActiveSupport::TimeWithZone.new(time, time_zone) | |
p(Date.today <=> (Time.now + 10.years)) | |
p(Time.now <=> (Date.today - 10.years)) | |
p((Time.now + 10.years) <=> Date.today) | |
p((Date.today - 10.years) <=> Time.now) | |
p((DateTime.now + 10.years) <=> Date.today) | |
p((Date.today - 10.years) <=> DateTime.now) | |
p((twz + 10.years) <=> Date.today) | |
p((Date.today - 10.years) <=> twz) | |
p Range.new(Date.today, p_inf).include?(Time.now + 10.years) | |
p Range.new(n_inf, Date.today).include?(Time.now - 10.years) | |
p Range.new(Time.now, p_inf).include?(Date.today + 10.years) | |
p Range.new(n_inf, Time.now).include?((Date.today - 10.years)) | |
p Range.new(Date.today, p_inf).include?(DateTime.now + 10.years) | |
p Range.new(n_inf, Date.today).include?(DateTime.now - 10.years) | |
p Range.new(Time.now, p_inf).include?(DateTime.now + 10.years) | |
p Range.new(n_inf, Time.now).include?((DateTime.now - 10.years)) | |
p Range.new(Date.today, p_inf).include?(twz + 10.years) | |
p Range.new(n_inf, Date.today).include?(twz - 10.years) | |
p Range.new(Time.now, p_inf).include?(twz + 10.years) | |
p Range.new(n_inf, Time.now).include?((twz - 10.years)) | |
p Range.new(Date.today, p_inf).include?(twz - 10.years) | |
p Range.new(n_inf, Date.today).include?(twz + 10.years) | |
p Range.new(Time.now, p_inf).include?(twz - 10.years) | |
p Range.new(n_inf, Time.now).include?((twz + 10.years)) |
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