From: Trans <transfire@...>
Date: 2006-12-08T22:15:13+09:00
Subject: Re: invasive parameters as method mode variables


Louis J Scoras wrote:
> You are exactly right: it is _less_ of a violation.  However, I think
> this is the part where I'm supposed to mention something about a
> ``slippery slope.''

:-) point taken.

> No, it's perfectly clear.  What it lacks is concision, and while
> concision is a desirable quality, it is not worth trading for clarity
> and transparency.  Saving a few keystrokes is not a good reason for
> adding a new mechanism that acts at a distance.

Well, "perfectly" is certainly overstating but I take you point.
However, it's not just keystrokes. Have to create a new Enumerator
object is also much less efficient.

> > In anycase, perhaps any breakage of the local encapsulation is too
> > much, and matz will never grant us Binding.of_caller. But then why does
> > this global default on String#each persist?
>
> I can't offer much insight on that, but I'd suspect it's historical.

I had talked to matz about it once, and he essentially said he didn't
want it for simplicity sake. I can;t say I quite understand that, but
there it is. hoever you just helped me release taht in 1.9+ the
situation is at least improved b/c

  "string".each(//)  #=> enumerator

Still less efficent but at least concise. And the global default can go
away.

T.