[MacRuby-devel] What's happened to Dispatch::Job?

Thu Jan 20 09:56:25 PST 2011

O'Reilly sent an email about the update yesterday (a bit late but still), I
posted an update on my blog: http://merbist.com and on twitter via @merbist
which was retweeted by @macruby  not sure what more I could do ;)
Suggestions welcome tho.

I'd like to make sure people know when I push an update. I'm also thinking
about offering a diff of the changes so one can easily see the
modifications.

- Matt

On Thu, Jan 20, 2011 at 9:48 AM, Martin Hawkins <martin.hawkins at gmail.com>wrote:

> Thanks, Matt; so I see. I must be one of the few people who have paid
> the full price for the book, expecting O'Reilly to let me know when
> updates were available, like The Pragmatic Bookshelf people do.
> Apparently not!
>
> Very helpful book nonetheless !
>
> On Jan 20, 5:27 pm, Matt Aimonetti <mattaimone... at gmail.com> wrote:
> > Note that I also updated the book to reflect the change.
> >
> > - Matt
> >
> > Sent from my iPhone
> >
> > On Jan 20, 2011, at 8:07, "Ernest N. Prabhakar, Ph.D." <
> prabh... at apple.com> wrote:
> >
> >
> >
> >
> >
> > > Hi Martin,
> >
> > > On Jan 20, 2011, at 7:58 AM, Martin Hawkins wrote:
> > >> The Ruby programming Language - David Flanagan and Yukihiro Matsumoto
> > >> The Well-Grounded Rubyist - David A. Black
> > >> Programming Ruby - Dave Thomas
> >
> > >> None of the above are focussed on the web.
> > >> Back to Grand Central Dispatch which was really the topic of the post
> > >> - Dispatch and Dispatch::Group are available from macirb, but
> > >> Dispatch::Job is not, so I suppose I'm really saying that in trying to
> > >> discover what is available re GCD for macruby, the current
> > >> documentation is confusing.
> >
> > > My apologies.  The GCD primitives are "baked in" to MacRuby as part of
> the Dispatch module.  You should be able to do "ri Dispatch" from the shell,
> or "help Dispatch" from inside MacRuby.
> >
> > > To get the high level routines you would require Dispatch, for which
> you need to first  install the gem.
> >
> > >http://rubygems.org/gems/dispatch
> > >https://github.com/gunn/dispatch
> >
> > > The short answer is that Job, Proxy, and Enumerable are only in the
> gem, while Queue, Semaphore and Source are built-in.  The gem includes some
> convenience methods for those, though, so it isn't entirely clear-cut.
> >
> > > -- Ernie P.
> >
> > >> On Jan 20, 3:46 pm, Johannes Fahrenkrug <jfahrenk... at gmail.com>
> wrote:
> > >>> Hi David,
> >
> > >>> I always thought the official tutorial on the Ruby site is pretty
> good:
> >
> > >>>http://www.ruby-lang.org/en/documentation/quickstart/
> >
> > >>> It is also normal practice to keep non-standard ruby functionality
> out of core and distribute is as a gem. That should not discourage you from
> using MacRuby or make you doubt that you can use it for Mac development now
> or in the future.
> >
> > >>> Johannes
> >
> > >>> Sent from my iPhone
> >
> > >>> On 20.01.2011, at 07:29, David Frantz <websterindus... at mac.com>
> wrote:
> >
> > >>>> Ok, forgive me for this question as I'm not a practicing Ruby
> programmer but why would Dispatch not be part of Mac Ruby?
> >
> > >>>> For those wondering why I've been hanging out here for the last
> couple of months it is due to the thought that Mac Ruby might become an
> officially supported platform for Mac development.  So I'm trying to wrap my
> head around why people would use it (Ruby) instead of C/C++/Objective C or
> Python for that matter.  Frankly I think I need convincing in another way so
> the next question is this, is there a good intro to Ruby that isn't oriented
> to web development?  My interest in the web is close to zero and
> unfortunately most Ruby books seem to be focused there.   Either that or my
> mind just isn't oriented to the Ruby way.
> >
> > >>>> David A Frantz
> > >>>> websterindustro4at4mac.com
> >
> > >>>> Sent from my iPhone.
> >
> > >>>> On Jan 20, 2011, at 9:56 AM, Mark Rada <mr... at marketcircle.com>
> wrote:
> >
> > >>>>> The dispatch library was removed from the core just before the 0.8
> release. Someone is maintaining it as a gem.
> >
> > >>>>> I thought the dispatch library only had the Enumerable module
> extensions, but I guess it had the Job class as well since I also don't have
> it (using a 0.9 nightly build).
> >
> > >>>>> Someone who has better knowledge than me might be able to answer
> your questions more thoroughly.
> >
> > >>>>> Mark Rada
> > >>>>> mr... at marketcircle.com
> >
> > >>>>> On 2011-01-20, at 9:48 AM, Martin Hawkins wrote:
> >
> > >>>>>> I was looking at the short intro to GCD in Matt's book 'Macruby -
> The
> > >>>>>> Definitive Guide'
> >
> > >>>>>> I have macruby 0.8 and I come across an immediate problem
> > >>>>>> macirb --simple-prompt
> > >>>>>>>> require 'dispatch'
> > >>>>>> LoadError: no such file to load -- dispatch
> >
> > >>>>>> However, it knows about Dispatch:
> > >>>>>> macirb --simple-prompt
> > >>>>>>>> @queue = Dispatch::Queue.new('a-queue-name')
> > >>>>>> => a-queue-name
> >
> > >>>>>> but it doesn't know about Job:
> > >>>>>> macirb --simple-prompt
> > >>>>>>>> job = Dispatch::Job.new { slow_operation }
> > >>>>>> NameError: uninitialized constant Dispatch::Job
> >
> > >>>>>> and, finally, the line on p24, 'To see the available concurrent
> > >>>>>> enumerable methods'
> > >>>>>> macruby -rdispatch -e "puts [].methods.grep(/^p_/)"
> > >>>>>> no such file to load -- dispatch (LoadError)
> > >>>>>> which, I suppose, just reiterates the first point.
> >
> > >>>>>> Is there an 'official' site where I can post queries regarding
> this
> > >>>>>> book?
> > >>>>>> _______________________________________________
> > >>>>>> MacRuby-devel mailing list
> > >>>>>> MacRuby-de... at lists.macosforge.org
> > >>>>>>http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel
> >
> > >>>>> _______________________________________________
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> >
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