Re: how to add button to emacs that play a elisp code

[Renato Pontefice]

Il giorno venerdì 12 settembre 2014 09:44:07 UTC+2, Renato Pontefice ha scritto:
> Il giorno venerdì 12 settembre 2014 04:07:37 UTC+2, Emanuel Berg ha scritto:
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> > Michael Heerdegen <michael_heerdegen@web.de> writes:
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> > > You may argue that you can avoid destructive
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> > > operations like `nconc' in your code to prevent that
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> > > problem.
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> > I was just about to say that - almost. While I don't
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> > think side effects are bad by definition, and I
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> > disklike the whole functional paradigm crusade with the
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> > Haskell hysteria and all, in practise it makes sense
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> > most of the time.
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> > But that is more related to your specific example than
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> > to the problem, right?
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> > > 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.
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> > > If you are not aware of that problem, it probably
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> > > 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.
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> > > BTW, this "effect" can also be used constructively,
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> > > it's not "harmful" per se.
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> > No, I have lots of quoted, and even backquoted stuff,
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> > which would have showed its harmful side by now, so I
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> > suppose I have been using it either "constructively" or
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> > where it doesn't matter which.
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> > By the way - computer science silly buzzword:
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> > idempotence, or "referential transparency".
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> > -- 
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> > underground experts united
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> Hi,
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> I've read he most part of the thread, but, 
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> as one who does not know elisp,I got lost in the debate :-(
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> wich is the prob on the execution of my (your) code, pressing the key:
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> (global-set-key (kbd "M-A") 'backward-word) ; Alt+Shift+a
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> (while (and (not (eobp))
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>             (search-forward "[-" nil 'move))
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>   (skip-chars-forward "A-Z")
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>   (unless (looking-at "-]")
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>     (message "Problem found, please fix and hit C-M-c to continue")
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>     (recursive-edit))))
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> ?
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> thank you
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> Renato

Hi, Ive found, that maybe, there is another parenthesis / maybe the last one,

I-ve erased it and emacs start without error, but if I press Alt/Shift/ A, 
nothing happens.

What-s wrong? 

Renato