Re: what is \consistsend
On Wed, 28 Jul 2004 20:08:28 +0200 Han-Wen Nienhuys <[EMAIL PROTECTED]> wrote:
> [EMAIL PROTECTED] writes:
> >
> > See: "Design Patterns" by Erich Gamma, Richard Helm, Ralph Johnson
> and
> > John Vlissides ("gang of four"), Addison-Wesley, 1995. ISBN
> 0-201-63361-2.
> >
> > A must-have book for software designers! (Actually, this book
> motivated a
> > whole bunch of other books by various authors over the last couple of
>
> > years, some of which you may also find to be interesting.)
>
> I am a skeptic of the whole concept of "pattern." Until someone can
> give a proper formalization of the concept, I will just solve the
> problem at hand with whatever technique I feel is appropriate.
>
> In other words, if you can explain me why what "An observer pattern"
> is, and why it would solve the engraver broadcast/acknowledge better,
> I will consider using it. (No, I don't feel inclined to read the book).
>
> --
>
> Han-Wen Nienhuys | [EMAIL PROTECTED] |
> http://www.xs4all.nl/~hanwen
They are simple:
- Chain of Responsibility means just 'put the output of a function as the input
of the next function', and
- Observer Pattern means that you have several 'observators' which keep track on
their state. When a certain state is present on an observer, the observer
notifies another observer, and the another one then fetches the changed state
and reacts according to the changed state.
Design patterns are nice in the sense that they are the 'building blocks' of an
UML diagram and manage to describe data flow to some extent (as a 2D diagram).
Another family are the very commonly used resign pattern, which are to be avoided ;)
http://www.dcc.unicamp.br/~oliva/fun/prog/resign-patterns
--
Heikki Junes
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Re: what is \consistsend
[EMAIL PROTECTED] writes:
>
> See: "Design Patterns" by Erich Gamma, Richard Helm, Ralph Johnson and
> John Vlissides ("gang of four"), Addison-Wesley, 1995. ISBN 0-201-63361-2.
>
> A must-have book for software designers! (Actually, this book motivated a
> whole bunch of other books by various authors over the last couple of
> years, some of which you may also find to be interesting.)
I am a skeptic of the whole concept of "pattern." Until someone can
give a proper formalization of the concept, I will just solve the
problem at hand with whatever technique I feel is appropriate.
In other words, if you can explain me why what "An observer pattern"
is, and why it would solve the engraver broadcast/acknowledge better,
I will consider using it. (No, I don't feel inclined to read the book).
--
Han-Wen Nienhuys | [EMAIL PROTECTED] | http://www.xs4all.nl/~hanwen
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Re: what is \consistsend
On Tue, 27 Jul 2004, Han-Wen Nienhuys wrote:
> [EMAIL PROTECTED] writes:
> >
> >
> > On Mon, 26 Jul 2004, Werner LEMBERG wrote:
> >
> > >
> > > What is \consistsend good for? It is nowhere documented.
> > >
> > >
> >
> > IIRC (guru hackers, please correct me if I am wrong!), engravers listen to
> > events following the design pattern of a responsibility chain rather than
> > following an observer pattern (BTW, why?). Consequently, the order
>
> If you can tell me what those are, I can explain you.
>
See: "Design Patterns" by Erich Gamma, Richard Helm, Ralph Johnson and
John Vlissides ("gang of four"), Addison-Wesley, 1995. ISBN 0-201-63361-2.
A must-have book for software designers! (Actually, this book motivated a
whole bunch of other books by various authors over the last couple of
years, some of which you may also find to be interesting.)
Greetings,
Jürgen
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what is \consistsend
[EMAIL PROTECTED] writes: > > What is \consistsend good for? It is nowhere documented. \consistsend has been removed from CVS. -- Han-Wen Nienhuys | [EMAIL PROTECTED] | http://www.xs4all.nl/~hanwen ___ lilypond-devel mailing list [EMAIL PROTECTED] http://lists.gnu.org/mailman/listinfo/lilypond-devel
Re: what is \consistsend
[EMAIL PROTECTED] writes: > > > On Mon, 26 Jul 2004, Werner LEMBERG wrote: > > > > > What is \consistsend good for? It is nowhere documented. > > > > > > IIRC (guru hackers, please correct me if I am wrong!), engravers listen to > events following the design pattern of a responsibility chain rather than > following an observer pattern (BTW, why?). Consequently, the order If you can tell me what those are, I can explain you. > matters in which engravers are added to contexts. I guess \consistsend > adds an engraver to the end of the chain, while \consists adds an engraver > to the head of the chain, but I may be wrong. yup. -- Han-Wen Nienhuys | [EMAIL PROTECTED] | http://www.xs4all.nl/~hanwen ___ lilypond-devel mailing list [EMAIL PROTECTED] http://lists.gnu.org/mailman/listinfo/lilypond-devel
Re: what is \consistsend
On Mon, 26 Jul 2004, Werner LEMBERG wrote: > > What is \consistsend good for? It is nowhere documented. > > IIRC (guru hackers, please correct me if I am wrong!), engravers listen to events following the design pattern of a responsibility chain rather than following an observer pattern (BTW, why?). Consequently, the order matters in which engravers are added to contexts. I guess \consistsend adds an engraver to the end of the chain, while \consists adds an engraver to the head of the chain, but I may be wrong. Greetings, Juergen > Werner > > > ___ > lilypond-devel mailing list > [EMAIL PROTECTED] > http://lists.gnu.org/mailman/listinfo/lilypond-devel > ___ lilypond-devel mailing list [EMAIL PROTECTED] http://lists.gnu.org/mailman/listinfo/lilypond-devel
what is \consistsend
What is \consistsend good for? It is nowhere documented. Werner ___ lilypond-devel mailing list [EMAIL PROTECTED] http://lists.gnu.org/mailman/listinfo/lilypond-devel
