From: "Kai Großjohann" <kai.grossjohann@gmx.net>
To: Phillip Lord <phillip.lord@newcastle.ac.uk>
Cc: help-gnu-emacs@gnu.org
Subject: Re: DynamicBindingVsLexicalBinding
Date: Mon, 14 Oct 2013 23:32:09 +0200 [thread overview]
Message-ID: <525C62D9.8070702@gmx.net> (raw)
In-Reply-To: <87txgk85em.fsf@zerg32.ncl.ac.uk>
Phillip Lord wrote:
>
> I've certainly used the feature that Kai likes, but mostly it has been
> to hack around code which I do not control or do not want to change.
> Nowadays, in general, I would want to advice code instead.
Here is a nice and straightforward application of dynamic binding (if I
do say so myself).
(defun perldoc ()
(interactive)
(require 'man)
(let ((manual-program "perldoc"))
(call-interactively 'man)))
The part where it does call-interactively is pretty ugly (but the full
interactive spec of the man function is even worse).
Of course a REAL developer would provide a manual reader class with
configurable manual reader class factories, and then use a dependency
injection container to implement a configurable manual reader class
factory factory. And because convention over configuration is a good
thing, we'll say that the ManManualReaderFactory creates "man" manual
readers whereas the PerldocManualReaderFactory creates "perldoc" manual
readers. So you can write a manual reader factory factory generator
that just generates an empty subclass of the
AbstractManualReaderFactoryBase at runtime. Yeah. That would be great.
You would even only need a few hundred lines of code to do it. And the
Spring dependency injection container to go with it is only a couple MB.
What's not to like about this? What? The Emacs Lisp solution is only
five lines of code you say? How can this _possibly_ provide the same
functionality that we've got with our awesome enterprisey framework?
Hm? Dynamic binding? You must be kidding!
Kai
next prev parent reply other threads:[~2013-10-14 21:32 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-12 17:56 DynamicBindingVsLexicalBinding Andreas Röhler
2013-10-12 18:35 ` DynamicBindingVsLexicalBinding Dmitry Gutov
2013-10-12 20:53 ` DynamicBindingVsLexicalBinding Drew Adams
2013-10-13 5:09 ` DynamicBindingVsLexicalBinding Thien-Thi Nguyen
2013-10-13 7:54 ` DynamicBindingVsLexicalBinding Andreas Röhler
2013-10-13 13:46 ` DynamicBindingVsLexicalBinding Kai Großjohann
2013-10-13 16:21 ` DynamicBindingVsLexicalBinding Drew Adams
2013-10-14 11:21 ` DynamicBindingVsLexicalBinding Phillip Lord
2013-10-14 13:45 ` DynamicBindingVsLexicalBinding Drew Adams
2013-10-14 16:05 ` DynamicBindingVsLexicalBinding Phillip Lord
2013-10-14 21:32 ` Kai Großjohann [this message]
2013-10-15 11:27 ` DynamicBindingVsLexicalBinding Phillip Lord
2013-10-15 20:43 ` DynamicBindingVsLexicalBinding Kai Großjohann
2013-10-16 12:57 ` DynamicBindingVsLexicalBinding Phillip Lord
[not found] ` <mailman.4127.1381928277.10748.help-gnu-emacs@gnu.org>
2013-10-16 14:26 ` DynamicBindingVsLexicalBinding Barry Margolin
[not found] ` <mailman.3929.1381681317.10748.help-gnu-emacs@gnu.org>
2013-10-14 11:27 ` DynamicBindingVsLexicalBinding Rustom Mody
2013-10-14 11:15 ` DynamicBindingVsLexicalBinding Phillip Lord
[not found] <mailman.3891.1381600459.10748.help-gnu-emacs@gnu.org>
2013-10-13 3:34 ` DynamicBindingVsLexicalBinding Barry Margolin
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