没有块传递时，是否有更好的方法来防止“屈服"? [英] Are there better ways to prevent 'yield' when no block is passed in?

问题描述

我有一个产生的方法，看起来像:

I have a method that yields, which looks like:

def a_method(*params)
  # do something
  yield
  # do something else
end

如果要传入一个块，我希望此方法产生该块；并且如果没有传入任何块，则该方法应轻率地跳过yield sentense，而不会崩溃，例如:

I want this method to yield the block if a block is passed in; and if no block is passed in, the method should sliently skip the yield sentense without crashing with something like:

 no block given (yield) (LocalJumpError)

当然，最直接的方法是将方法更改为:

Of course, the most straightforward way is changing the method to:

def a_method(*params, &block)
  # do something
  yield if block
  # do something else
end

但是没有更漂亮的方法吗?

But aren't there prettier ways?

推荐答案

是的！ :)

def a_method(*params)
  # ...
  yield if block_given?
  # ...
end

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