From: Ezra Zygmuntowicz <ezmobius@...>
Date: 2006-10-19T13:34:18+09:00
Subject: Re: whats this lambda code doing?


On Oct 18, 2006, at 9:08 PM, Morton Goldberg wrote:

> On Oct 18, 2006, at 10:48 PM, Ezra Zygmuntowicz wrote:
>
>> 	What it is doing with the inject is essentially building up a  
>> block with multiple procs inside it and then calling that. So the  
>> block that gets called looks something like this by the time it  
>> gets call'ed:
>>
>> lambda {
>>   lambda { Foo.with_block hash, &blk }
>>   lambda { Bar.with_block hash, &blk }
>>   lambda { Baz.with_block hash, &blk }
>> }.call
>
> Maybe I'm being even more dense than usual, but I can't accept  
> that. It wouldn't produce the observed print-out order. I think it  
> must be more like:
>
>    lambda { Baz.with_block(hash,
>       lambda { Bar.with_block(hash,
>          lambda { Foo.with_block(hash, &blk) }) }) }.call
>
> Regards, Morton
>

	Ahh yes you are totally correct. See? It is tricky code ;)


-- Ezra Zygmuntowicz 
-- Lead Rails Evangelist
-- ez@engineyard.com
-- Engine Yard, Serious Rails Hosting
-- (866) 518-YARD (9273)