《大話設計模式》ruby版代碼：簡單原廠模式

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之前有看過《ruby設計模式》，不過漸漸的都忘記了。現在買了一個大話設計模式，看起來不是那麼枯燥，順便將代碼用ruby實現了一下。

 

# -*- encoding: utf-8 -*-#運算類class Operation    attr_accessor :number_a,:number_b        def initialize(number_a = nil, number_b = nil)        @number_a = number_a        @number_b = number_b    end        def result        0    endend#加法類class OperationAdd < Operation    def result        number_a + number_b    endend#減法類class OperationSub < Operation    def result        number_a - number_b    endend#乘法類class OperationMul < Operation    def result        number_a * number_b    endend#除法類class OperationDiv < Operation    def result        raise ‘除數不能為0‘ if number_b == 0            number_a / number_b    endend#工廠類class OperationFactory    def self.create_operate(operate)        case operate        when ‘+‘            OperationAdd.new()        when ‘-‘            OperationSub.new()        when ‘*‘            OperationMul.new()        when ‘/‘            OperationDiv.new()        end    endendoper = OperationFactory.create_operate(‘/‘)oper.number_a = 1oper.number_b = 2p oper.result

 

《大話設計模式》ruby版代碼：簡單原廠模式