Ruby 中的“super”是什么？

Question

在 Internet 上浏览有关 ruby​​ on rails 的信息时，我看到了super. 有人能说出它是什么以及它能做什么吗？

Answer 1

super 方法调用父类方法。

例如：

class A
  def a
    # do stuff for A
  end
end

class B < A
  def a
    # do some stuff specific to B
    super
    # or use super() if you don't want super to pass on any args that method a might have had
    # super/super() can also be called first
    # it should be noted that some design patterns call for avoiding this construct
    # as it creates a tight coupling between the classes.  If you control both
    # classes, it's not as big a deal, but if the superclass is outside your control
    # it could change, w/o you knowing.  This is pretty much composition vs inheritance
  end
end

如果这还不够，那么你可以从这里进一步学习