From: James Edward Gray II <james@...>
Date: 2007-08-07T00:45:04+09:00
Subject: Re: yield or call?

On Aug 6, 2007, at 10:39 AM, Phlip wrote:

> Pit Capitain wrote:
>
>>> When writing API-style code, I always start with &block because  
>>> it's only a
>>> matter of time before I refactor the code and start passing that  
>>> &block into
>>> a helper method.
>>
>> Phlip, you can do the equivalent with yield:
>>
>>   def x(&b); xx(&b); end
>>   def xx(&b); b.call; end
>>
>> vs.
>>
>>   def y; yy { yield }; end
>>   def yy; yield; end
>>
>> Also in this case the yield version is much faster.
>
> What if the block were optional?

You can use block_given? to find out if a block was provided.

James Edward Gray II