From: Logan Capaldo <logancapaldo@...>
Date: 2005-10-10T17:15:37+09:00
Subject: Re: using lambda/Proc can prevent a lot of garbage collection


On Oct 9, 2005, at 11:31 PM, Trans wrote:

>
> Logan Capaldo wrote:
>
>
>> really don't believe thats necessary. Can anyone come up with a use
>> for an eval taking a string that CAN'T be acheieved by an eval that
>> takes a block? (well, irb I suppose).
>>
>
> No closure.
>
> T.
>
>
>

Yes, but if eval only took a block the closure could be over exactly  
what was referenced in the block instead of (relatively) everything.

eg.

x = 2
lambda { eval("y = 2; puts y") }.call # x is in the closure

vs.

x = 2

eval { y = 2; puts y } # x isn't in the closure cause its guaranteed  
not to reference it