Matlab策略模式

策略模式的意圖是定義一系列演算法，把它們一個一個封裝起來，並且使它們可以互相替換。通常每個策略演算法不可抽象再分。本人仿照https://www.runoob.com/design-pattern/strategy-pattern.html所給的例子，用Matlab代碼對其進行實現

Strategy.m

classdef Strategy < handle
    methods(Abstract)
        doOperation(~,~,~);
    end
end

OperationAdd.m

classdef OperationAdd < Strategy
    methods
        function res = doOperation(~,num1,num2)
            res = num1 + num2;
        end
    end
end

 OperationMultiply.m

classdef OperationMultiply < Strategy
    methods
        function res = doOperation(~,num1,num2)
            res = num1 * num2;
        end
    end
end

Context.m

classdef Context < handle
    properties
        strategy
    end   
    methods
        function obj = Context(strategy)
            obj.strategy = strategy;
        end        
        function res = executeStrategy(obj,num1,num2)
            res = obj.strategy.doOperation(num1,num2);
        end
    end
end

測試代碼：

context = Context(OperationAdd());
disp("2 + 3 = " + context.executeStrategy(2, 3));
 
context =Context(OperationMultiply());
disp("2 * 3 = " + context.executeStrategy(2, 3));