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Contents
#--
# Source: http://tfletcher.com/lib/gradiate.rb
# Author:: Tim Fletcher
# Copyright:: Copyright (c) 2008, Tim Fletcher
# License:: Ruby License?
# Submit to Facets?:: Yes
# Developer notes::
# Changes::
#++
class Numeric #:nodoc:
def diff(n)
return (self > n ? self - n : n - self)
end
end
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |_
# |_|\___||___/\__|
#
=begin test
require 'spec'
describe Numeric.instance_method(:diff) do
it "should not matter which object is the receiver" do
1.diff(3).should == 2
3.diff(1).should == 2
end
it "should be the same as taking the absolute value of the difference" do
1.diff(1).should == (1 - 1).abs
1.diff(3).should == (1 - 3).abs
3.diff(1).should == (3 - 1).abs
1. diff(-1).should == (1 - -1).abs
-1.diff(1). should == (-1 - 1).abs
end
end
=end
Version data entries
7 entries across 7 versions & 1 rubygems