Overriding Ruby's spaceship operator <=>
- by ericsteen1
I am trying to override Ruby's <= (spaceship) operator to sort apples and oranges so that apples come first sorted by weight, and oranges second, sorted by sweetness. Like so:
module Fruity
attr_accessor :weight, :sweetness
def <=>(other)
# use Array#<=> to compare the attributes
[self.weight, self.sweetness] <=> [other.weight, other.sweetness]
end
include Comparable
end
class Apple
include Fruity
def initialize(w)
self.weight = w
end
end
class Orange
include Fruity
def initialize(s)
self.sweetness = s
end
end
fruits = [Apple.new(2),Orange.new(4),Apple.new(6),Orange.new(9),Apple.new(1),Orange.new(22)]
p fruits
#should work?
p fruits.sort
But this does not work, can someone tell what I am doing wrong here, or a better way to do this?
