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hammerdr/sort.rb

Created March 13, 2015 19:27
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  1. hammerdr created this gist Mar 13, 2015.
    27 changes: 27 additions & 0 deletions sort.rb
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,27 @@
    Animal = Struct.new(:name, :height, :legs)
    animals = [
    Animal.new('dog', 10, 4),
    Animal.new('cat', 5, 4),
    Animal.new('snake', 2, 0),
    Animal.new('sloth', 5, 4),
    Animal.new('ant', 1, 6)
    ]

    ASCENDING = 'ascending'
    DESCENDING = 'descending'

    class Order < Struct.new(:order, :value)
    def <=>(other)
    if order == ASCENDING
    value <=> other.value
    else
    other.value <=> value
    end
    end
    end

    def sort(values, key, order=ASCENDING)
    values.sort_by { |value| Order.new(order, value.send(key)) }
    end

    puts sort(animals, 'name', DESCENDING)