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Re: how to add button to emacs that play a elisp code
From: |
Renato Pontefice |
Subject: |
Re: how to add button to emacs that play a elisp code |
Date: |
Fri, 12 Sep 2014 00:44:07 -0700 (PDT) |
User-agent: |
G2/1.0 |
Il giorno venerdì 12 settembre 2014 04:07:37 UTC+2, Emanuel Berg ha scritto:
> Michael Heerdegen <michael_heerdegen@web.de> writes:
>
>
>
> > You may argue that you can avoid destructive
>
> > operations like `nconc' in your code to prevent that
>
> > problem.
>
>
>
> I was just about to say that - almost. While I don't
>
> think side effects are bad by definition, and I
>
> disklike the whole functional paradigm crusade with the
>
> Haskell hysteria and all, in practise it makes sense
>
> most of the time.
>
>
>
> But that is more related to your specific example than
>
> to the problem, right?
>
>
>
> > But that isn't enough either: when you pass your list
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> > to some function you didn't define yourself (e.g. a
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> > function that is part of Emacs), it is passed as
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> > reference (as usual in Lisp), and it may be modified
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> > by that function by side effect, so that your program
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> > "changes" too.
>
> >
>
> > If you are not aware of that problem, it probably
>
> > won't bite you often, but when it does, you'll need a
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> > lot of time to find out what's actually going on.
>
> >
>
> > BTW, this "effect" can also be used constructively,
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> > it's not "harmful" per se.
>
>
>
> No, I have lots of quoted, and even backquoted stuff,
>
> which would have showed its harmful side by now, so I
>
> suppose I have been using it either "constructively" or
>
> where it doesn't matter which.
>
>
>
> By the way - computer science silly buzzword:
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> idempotence, or "referential transparency".
>
>
>
> --
>
> underground experts united
Hi,
I've read he most part of the thread, but,
as one who does not know elisp,I got lost in the debate :-(
wich is the prob on the execution of my (your) code, pressing the key:
(global-set-key (kbd "M-A") 'backward-word) ; Alt+Shift+a
(while (and (not (eobp))
(search-forward "[-" nil 'move))
(skip-chars-forward "A-Z")
(unless (looking-at "-]")
(message "Problem found, please fix and hit C-M-c to continue")
(recursive-edit))))
?
thank you
Renato
- Re: how to add button to emacs that play a elisp code, (continued)
- Message not available
- Re: how to add button to emacs that play a elisp code, Emanuel Berg, 2014/09/11
- Re: how to add button to emacs that play a elisp code, Pascal J. Bourguignon, 2014/09/11
- Re: how to add button to emacs that play a elisp code, Emanuel Berg, 2014/09/11
- Re: how to add button to emacs that play a elisp code, Michael Heerdegen, 2014/09/11
- Message not available
- Re: how to add button to emacs that play a elisp code, Emanuel Berg, 2014/09/11
- Re: how to add button to emacs that play a elisp code, Michael Heerdegen, 2014/09/11
- Re: how to add button to emacs that play a elisp code, Drew Adams, 2014/09/12
- Message not available
- Re: how to add button to emacs that play a elisp code, Emanuel Berg, 2014/09/11
- Re: how to add button to emacs that play a elisp code,
Renato Pontefice <=
- Re: how to add button to emacs that play a elisp code, Renato Pontefice, 2014/09/12
- Re: how to add button to emacs that play a elisp code, Emanuel Berg, 2014/09/12
- Re: how to add button to emacs that play a elisp code, Pascal J. Bourguignon, 2014/09/13
- Re: how to add button to emacs that play a elisp code, Rusi, 2014/09/13
- Re: how to add button to emacs that play a elisp code, Rusi, 2014/09/14
- Re: how to add button to emacs that play a elisp code, Emanuel Berg, 2014/09/14
- Re: how to add button to emacs that play a elisp code, Emanuel Berg, 2014/09/14
- Re: how to add button to emacs that play a elisp code, Alex Kost, 2014/09/15
- Message not available
- Re: how to add button to emacs that play a elisp code, Emanuel Berg, 2014/09/15
- Re: how to add button to emacs that play a elisp code, Alex Kost, 2014/09/16