79 lines
1.3 KiB
Ruby
79 lines
1.3 KiB
Ruby
#!/usr/bin/env ruby
|
|
# coding: utf-8
|
|
# Copyright muflax <mail@muflax.com>, 2011
|
|
# License: GNU GPL 3 <http://www.gnu.org/copyleft/gpl.html>
|
|
|
|
class Range
|
|
def +(other)
|
|
pair_or_num :+, other
|
|
end
|
|
|
|
def -(other)
|
|
pair_or_num :-, other
|
|
end
|
|
|
|
def *(other)
|
|
pair_or_num :*, other
|
|
end
|
|
|
|
def /(other)
|
|
pair_or_num :/, other.to_f
|
|
end
|
|
|
|
def **(other)
|
|
pair_or_num :**, other
|
|
end
|
|
|
|
def %(other)
|
|
pair_or_num :%, other
|
|
end
|
|
|
|
def to_f
|
|
(self.begin.to_f..self.end.to_f)
|
|
end
|
|
|
|
def to_i
|
|
(self.begin.to_i..self.end.to_i)
|
|
end
|
|
|
|
def average
|
|
(self.begin + self.end) / 2.0
|
|
end
|
|
|
|
def coerce(other)
|
|
if other.is_a? Range
|
|
return other, self
|
|
elsif other.is_a? Numeric
|
|
return (other..other), self
|
|
else
|
|
super
|
|
end
|
|
end
|
|
|
|
private
|
|
|
|
def pair_or_num operator, other
|
|
if other.is_a? Range
|
|
calc_pairs operator, other
|
|
elsif other.is_a? Numeric
|
|
calc_pairs operator, (other..other)
|
|
else
|
|
raise NoMethodError
|
|
end
|
|
end
|
|
|
|
def calc_pairs operator, other
|
|
parts_x = [self.begin, self.end]
|
|
parts_y = [other.begin, other.end]
|
|
|
|
results = []
|
|
parts_x.each do |x|
|
|
parts_y.each do |y|
|
|
results << x.send(operator, y)
|
|
end
|
|
end
|
|
|
|
(results.min..results.max)
|
|
end
|
|
end
|