Re: Open Source Projects for Beg/ Intermediate
Not long ago I was faced with the same dilemma: I am learning clojure and to practise and improve my skills I'd like to contribute to an open source project. Which one should I pick? And then I came across this: http://prog21.dadgum.com/80.html Enjoy :) U -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: call to idiomatic loop works as stand alone but not when wrapped in my function
n 15/04/2011 01:21, Avram wrote: Yes, I am missing a way to turn the [ filenames] into something like name1 name2 … You also missed Joost's answer =) Use apply for this : user (+ 1 2 3) 6 user (apply + (list 1 2 3)) 6 So in your case : (apply read-files-into-memory fnames) hth, Sacha -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: partial vs anonymous function?
For those who duck it in the future, there is more discussion here: http://groups.google.com/group/clojure-dev/browse_thread/thread/f4907ebca8ef6e11 -David -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: eval'ing records
For those who duck it in the future, there is more discussion here: http://groups.google.com/group/clojure-dev/browse_thread/thread/f4907ebca8ef6e11 -David -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Clojure 1.2.1 download?
Now that 1.2.1 is released, will clojure.org download be updated too? Or is this a release we should only consume via mvn repo? Thanks -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Open Source Projects for Beg/ Intermediate
I don't see what you're getting at. I want to implement something big all by myself, please tell me what to do is not productive for the community, and not helpful for the novice asking. I want to get my feet wet, could anybody use some basic help? is good for everyone involved. I disapprove of discouraging people from offering to help with OSS: that's how you get started and how you get good. On Apr 16, 1:40 am, Ulises ulises.cerv...@gmail.com wrote: Not long ago I was faced with the same dilemma: I am learning clojure and to practise and improve my skills I'd like to contribute to an open source project. Which one should I pick? And then I came across this:http://prog21.dadgum.com/80.html Enjoy :) U -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Weening myself off of global state - what's the idiomatic way to solve this?
Ended up updating it to use lazy sequences.
https://gist.github.com/887256
Already feels much better! I do still have a bit of state with the
tracking of which frame we're on but I'll certainly take that over the
glob of atoms before.
Next up is handling some of the more hairy bits with user input and
the like just to see how that would map, and getting multiple balls
running. Hopefully I can even get away from the lazy sequence method.
Thanks for the help!
-Brandon
On Apr 14, 11:19 pm, Brandon Ferguson bnfergu...@gmail.com wrote:
Holy crap that's a lot to digest! Thanks! A lot of ideas in here to
play with. For me and my purposes with Processing the big challenge
has been the fact that I have little say about the draw loop. It just
fires (or I can call it manually with a redraw, but then it just
executes whatever is in that function). I had a nice recursive
function with no state in the beginning but the first fire of draw
would set it off and it'd draw a bunch of the screen and I'd never see
anything after that from it (cause it'd never return and we'd not get
to the next draw call/frame). Think there might be ways around that
just not sure yet.
Thanks again, and I'll certainly post with an update with where I get
(probably won't be able to dive into it again until the weekend sadly :
( ).
On Apr 14, 1:00 pm, Ken Wesson kwess...@gmail.com wrote:
On Wed, Apr 13, 2011 at 1:22 PM, Brandon Ferguson bnfergu...@gmail.com
wrote:
I'm not sure if this is the place to ask this but I've been struggling
with a few things in the world of Clojure. I've been using Processing
to learn Clojure (since I'm somewhat familiar with Processing) but the
tough part has been dealing with things like x, y positions of objects
without keeping some global state (I'm not sure if it's even
possible).
If you're currently using atoms, you already have a function to
compute the new position from the old, say, next-position, which you
use with something like (swap! ball-pos next-position).
Now consider this: (iterate next-position initial-ball-pos). That
evaluates to an (infinite!) sequence of ball positions. You could have
an animation loop step along this sequence, render a frame, wait,
step, render, wait, etc. until the ESC key is hit (or whatever).
For multiple balls that might interact with one another, a given
ball's next position becomes a function of the other ball positions
and not just its own. So you end up with:
(iterate next-world-state initial-world-state)
with world states being e.g. maps of ball-IDs to ball-positions or
something. Obviously, other kinds of changeable world state can be
included, too, e.g. Pong paddle positions, or the locations and amount
of damage taken by Arkanoid bricks.
This works until you get interactive (e.g. letting a human player
control a paddle or something). At that point, iterate becomes a bit
icky because the function becomes impure (as it polls the input
devices).
Then you probably just want two components:
1. A Swing GUI that captures mouse and keyboard events in the game's
JPanel as well as rendering the frames there.
2. A game loop.
The simplest case uses the Swing EDT as the game loop, with a Timer
triggering game updates. But that requires mutable state for the game
state to persist between Timer events.
The other case keeps most of the game state immutable, but requires a
bit of mutability to pass input to the game from the GUI:
1. The Swing event handlers post input messages to a
LinkedBlockingQueue, or update atoms or refs holding the current
position of the mouse and state (down or up) of relevant mouse buttons
and keyboard keys.
2. The game loop runs in its own thread and looks something like this:
(loop [foo bar other game state variables]
...
(recur new-foo new-bar new-other ...)...)
The game checks the input state, or drains the LinkedBlockingQueue, or
whatever when it comes around to updating the player's position.
One way to do it is just to have a set of game world objects:
(loop [time (System/currentTimeMillis)
world (hash-set (cons (new-player) (generate-initial-world-state)))]
(let [world (map (partial update-position world) world)
new-objects (mapcat new-things world)
damages (reduce (partial merge-with +) {} (map do-damage world))
world (concat
new-objects
(remove dead?
(map (partial apply-damages damages) world)))]
(SwingUtilities/invokeAndWait
(fn []
(let [g (get-the-jpanel's-double-buffer-graphics)]
(doseq [obj world] (draw-on! obj g)))
(flip-the-jpanel's-double-buffer!)))
(if (some is-player? world)
(let [elapsed (- (System/currentTimeMillis) time)
sl (- *ms-per-frame* elapsed)]
(if ( sl 0) (Thread/sleep sl))
(recur
Re: Open Source Projects for Beg/ Intermediate
I disapprove of discouraging people from offering to help with OSS: that's how you get started and how you get good. Well, it's not really discouraging. Or at least, I don't see it that way. I see it more like encouraging to contribute but not regardless of personal interest. Personal interest on a project is a great motivator. Technical interest is likely to get you some of the way, but not all the way. Just mho :) U -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Open Source Projects for Beg/ Intermediate
On Thu, Apr 14, 2011 at 6:47 PM, Carin Meier gigasq...@yahoo.com wrote: I have fallen for Clojure. I would love to be able to practice and hone my skills while contributing something to an open source project. Do you have any suggestions for projects that might have some low-hanging fruit for a newish person like me. Any floors that need sweeping? When I started with Clojure, I mostly focused on solving problems in Clojure that cropped up in my day job (not using Clojure) so I was essentially double developing a lot of things. That kept working in a domain I knew, knowing how to solve those problems in language X and then figuring out how to solve them elegantly in Clojure. Some times I'd ask on the #clojure IRC channel on freenode for input - folks are extremely helpful and the feedback was very valuable (and continues to be!). I think the advice to find - or create - a project that interests you and solves a problem you have is good advice. You need to know the domain so that you're not trying to learn two languages at once (the idioms of the domain language and the idioms of the programming language). So, questions to Carin, Alex and Alan (and Ulises): What interests you? What problems do you have that you'd like solutions for? Knowing that, folks might be able to point you at existing projects to take part in (or might confirm no such project exists and they'd be interested in collaborating with you)... -- Sean A Corfield -- (904) 302-SEAN An Architect's View -- http://corfield.org/ World Singles, LLC. -- http://worldsingles.com/ Railo Technologies, Inc. -- http://www.getrailo.com/ Perfection is the enemy of the good. -- Gustave Flaubert, French realist novelist (1821-1880) -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Open Source Projects for Beg/ Intermediate
On Apr 14, 6:47 pm, Carin Meier gigasq...@yahoo.com wrote: I have fallen for Clojure. I would love to be able to practice and hone my skills while contributing something to an open source project. Do you have any suggestions for projects that might have some low-hanging fruit for a newish person like me. Any floors that need sweeping? Clojars could use some help: https://github.com/ato/clojars-web/issues Here's a thread about possible improvements: http://groups.google.com/group/clojars-maintainers/browse_thread/thread/d4149ec96316d5b1 Chime in on that thread if anything there looks appealing. -Phil -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
Re: Open Source Projects for Beg/ Intermediate
It feels to me that in addition to asking which open source projects would be useful/beneficial for novices to hack on, it would be useful to have a list of open source projects that are useful/beneficial for novices to read and understand. One thing that Clojure has taught me is that code reading is both possible and highly valuable. I think that having a list of approachable and idiomatic code bases would be a beneficial asset to our community. Sam --- http://sam.aaron.name On 15 Apr 2011, at 02:47, Carin Meier wrote: I have fallen for Clojure. I would love to be able to practice and hone my skills while contributing something to an open source project. Do you have any suggestions for projects that might have some low-hanging fruit for a newish person like me. Any floors that need sweeping? Carin Meier @carinmeier -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
