在Ruby中,多态性允许对象对不同的方法调用作出响应。为了避免命名冲突,你可以采取以下几种策略:
module MyModule
def my_method
puts "This is my method"
end
end
class MyClass
include MyModule
def my_method
puts "This is my class method"
end
end
obj = MyClass.new
obj.my_method # 输出 "This is my class method"
class MyNamespace::MyClass
def my_method
puts "This is my method"
end
end
obj = MyNamespace::MyClass.new
obj.my_method # 输出 "This is my method"
alias_method
:如果你需要在子类中重写父类的方法,但又不想改变方法名,可以使用alias_method
来为父类的方法创建一个新的别名。class MyBaseClass
def my_method
puts "This is my base class method"
end
end
class MyDerivedClass < MyBaseClass
def my_method
puts "This is my derived class method"
end
alias_method :old_my_method, :my_method
end
obj = MyDerivedClass.new
obj.my_method # 输出 "This is my derived class method"
obj.old_my_method # 输出 "This is my base class method"
super
关键字:在子类中重写父类的方法时,可以使用super
关键字来调用父类的实现,从而避免死循环。class MyBaseClass
def my_method
puts "This is my base class method"
end
end
class MyDerivedClass < MyBaseClass
def my_method
puts "This is my derived class method"
super
end
end
obj = MyDerivedClass.new
obj.my_method # 输出 "This is my derived class method" 和 "This is my base class method"
遵循这些策略,你可以在Ruby中有效地利用多态性,同时避免命名冲突。