From: Gennady Bystritksy <gfb@...>
Date: 2005-01-07T00:47:27+09:00
Subject: Re: Return from a block?

E S wrote:
> Jamis Buck wrote:
> 
>> On 08:17 Thu 06 Jan     , Carlos wrote:
>>
>>> [Howard Lewis Ship <hlship@gmail.com>, 2005-01-06 00.11 CET]
>>>
>>>> Is there a way to return control from the block to the method?
>>>
>>>
>>> next
>>>
>>> Good luck.
>>
>>
>>
>> To elaborate a little more:
>>
>>   a = proc { |i| next i+1 }
>>   p a.call(5)
>>
>> Hope that helps. I can understand why 'return' behaves like it does,
>> but there are times I wish there was a more intuitive keyword for
>> returning a value from a block. 'next' just feels wrong to me. :(
> 
> 
> For just returning control, throw...catch should work, for returning
> a value, Kernel.callcc? But Mr. Buck's solution is certainly shorter.

throw...catch can be used for returning a value as well, by the way. A 
second parameter to "throw" is used as a return value from "catch".

Gennady.

> 
> E
> 
>