Re: core.async + swing
Den måndagen den 29:e juli 2013 kl. 16:44:50 UTC+2 skrev eliass...@yahoo.com: Hi, I'm playing around with core.async a bit. Is it possible to put java.awt.Graphics object into a channel and do the drawing in a go loop consuming this channel. The problem I'm having is that when I consume the channel, core.async has switched to another thread. I'm not in the Swing thread anymore. Is there a way to stay in the Swing thread while doing this? This is how I setup the producer: (defn create-canvas [paint-channel] (proxy [JButton] [] (getPreferredSize [] (Dimension. 300 300)) (paintComponent [g] (go (proxy-super paintComponent g) (! paint-channel g) ;I've tried put! too Thanks! --anders -- -- 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 unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: core.async + swing
Hi Tim, I did try invokeLater before unsuccessfully. I think the problem was that the Graphics I passed on the channel wasn't valid anymore. This time around I tried getting the graphics with Component.getGraphics instead, inside invokeLater. That worked! By the way, I think core.async is fantastic, what a relief to get rid of all the callbacks. Thanks so much for your help and for core.async! --anders Den måndagen den 29:e juli 2013 kl. 16:52:31 UTC+2 skrev tbc++: I recommend using invokeLater to send a fn to Swing to do the rendering. http://docs.oracle.com/javase/6/docs/api/javax/swing/SwingUtilities.html#invokeLater(java.lang.Runnable) If you need Swing to notify the go channel when the rendering is complete, you can do something like this: (go (let [c (chan)] (SwingUtilities/invokeLater (fn [] (do ...stuff ) (close! c))) (! c))) Wrap in a macro if you find yourself doing it a lot: (go (in-swing-and-wait ...stuff...)) Timothy On Mon, Jul 29, 2013 at 8:44 AM, eliass...@yahoo.com javascript:wrote: Hi, I'm playing around with core.async a bit. Is it possible to put java.awt.Graphics object into a channel and do the drawing in a go loop consuming this channel. The problem I'm having is that when I consume the channel, core.async has switched to another thread. I'm not in the Swing thread anymore. Is there a way to stay in the Swing thread while doing this? This is how I setup the producer: (defn create-canvas [paint-channel] (proxy [JButton] [] (getPreferredSize [] (Dimension. 300 300)) (paintComponent [g] (go (proxy-super paintComponent g) (! paint-channel g) ;I've tried put! too Thanks! --anders -- -- You received this message because you are subscribed to the Google Groups Clojure group. To post to this group, send email to clo...@googlegroups.comjavascript: Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+u...@googlegroups.com javascript: 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 unsubscribe from this group and stop receiving emails from it, send an email to clojure+u...@googlegroups.com javascript:. For more options, visit https://groups.google.com/groups/opt_out. -- “One of the main causes of the fall of the Roman Empire was that–lacking zero–they had no way to indicate successful termination of their C programs.” (Robert Firth) -- -- 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 unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: YA regular expression tool
On Monday, 29 July 2013 21:20:49 UTC+1, Joel Holdbrooks wrote: I spent some time this weekend writing a little tool for generating regular expressions *from known inputs*. My goal is to produce regular expressions that backtrack as few times as possible along with a complete and total disregard for readability. :) The code for the tool is here https://github.com/noprompt/frak. Suggestions/ideas would be greatly appreciated. Nice - I like the fact that it has a very simple API that focuses on doing just one thing well! -- -- 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 unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Invalid token exception on a / operator
Is / a valid clojure function name (valid, but not recommended)? I tought so because of clojure.core// in the repl there is also no problem with clojure.core//: clojure.core// ;=#core$_SLASH_ clojure.core$_SLASH_@6d996380 but if / is in another namespace, for example in core.matrix: clojure.core.matrix.operators// RuntimeException Invalid token: clojure.core.matrix.operators// clojure.lang.Util.runtimeException (Util.java:219) clearly this is an edge case, because / also separates namespaces but I think if clojure.core// is valid clojure.core.matrix.operators// should also be a valid token?! regards Maik Schünemann -- -- 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 unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Invalid token exception on a / operator
It's going to be possible in clojure-1.6 see: https://github.com/clojure/clojure/commit/88cad2510243289d2bbe28cf8bd14007d9df5fc3 Maik Schünemann writes: Is / a valid clojure function name (valid, but not recommended)? I tought so because of clojure.core// in the repl there is also no problem with clojure.core//: clojure.core// ;=#core$_SLASH_ clojure.core$_SLASH_@6d996380 but if / is in another namespace, for example in core.matrix: clojure.core.matrix.operators// RuntimeException Invalid token: clojure.core.matrix.operators// clojure.lang.Util.runtimeException (Util.java:219) clearly this is an edge case, because / also separates namespaces but I think if clojure.core// is valid clojure.core.matrix.operators// should also be a valid token?! regards Maik Schünemann -- -- -- 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 unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: Invalid token exception on a / operator
Thanks Nicola! On Tue, Jul 30, 2013 at 2:32 PM, Nicola Mometto brobro...@gmail.com wrote: It's going to be possible in clojure-1.6 see: https://github.com/clojure/clojure/commit/88cad2510243289d2bbe28cf8bd14007d9df5fc3 Maik Schünemann writes: Is / a valid clojure function name (valid, but not recommended)? I tought so because of clojure.core// in the repl there is also no problem with clojure.core//: clojure.core// ;=#core$_SLASH_ clojure.core$_SLASH_@6d996380 but if / is in another namespace, for example in core.matrix: clojure.core.matrix.operators// RuntimeException Invalid token: clojure.core.matrix.operators// clojure.lang.Util.runtimeException (Util.java:219) clearly this is an edge case, because / also separates namespaces but I think if clojure.core// is valid clojure.core.matrix.operators// should also be a valid token?! regards Maik Schünemann -- -- -- 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 unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out. -- -- 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 unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
changing a value in a vector of maps
Suppose I have a vector of maps (this could also be a vector of records)
(def aa [{:a 0 :b 0 :c 0} {:a 50 :b 0 :c 0} {:a 100 :b 0 :c 0}])
and I want to go in an change the value of associated with :c when :a has a
value of 50, so that the final col of maps looks like
[{:a 0 :b 0 :c 0} {:a 50 :b 0 :c 3} {:a 100 :b 0 :c 0}].
I came up with a function that does this:
(defn find-assoc-in
[k v mv]
(let [f #(if (= ((first k) %) (first v))
(assoc % (second k) (second v))
%)]
(map f mv)))
(find-assoc-in [:a :c] [50 3] aa)
The problem with this function is that it potentially does a lot
of unnecessary copying of elements that aren't changed, and thus has a lot
of garbage collection. I would like help coming up with something that
does much less garbage collection.
Will someone please point out a better way of doing this?
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Re: changing a value in a vector of maps
Hi,
how about
(vec
(for [{:keys [a b c] :as m} aa]
(if (= a 50) (assoc m :c 3) m)))
:)
Jim
On 30/07/13 18:53, cej38 wrote:
Suppose I have a vector of maps (this could also be a vector of records)
(def aa [{:a 0 :b 0 :c 0} {:a 50 :b 0 :c 0} {:a 100 :b 0 :c 0}])
and I want to go in an change the value of associated with :c when :a
has a value of 50, so that the final col of maps looks like
[{:a 0 :b 0 :c 0} {:a 50 :b 0 :c 3} {:a 100 :b 0 :c 0}].
I came up with a function that does this:
(defn find-assoc-in
[k v mv]
(let [f #(if (= ((first k) %) (first v))
(assoc % (second k) (second v))
%)]
(map f mv)))
(find-assoc-in [:a :c] [50 3] aa)
The problem with this function is that it potentially does a lot
of unnecessary copying of elements that aren't changed, and thus has a
lot of garbage collection. I would like help coming up with something
that does much less garbage collection.
Will someone please point out a better way of doing this?
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October Barnstorming in Europe
Michael Nygard [1] and Stu Halloway [2] will be in Europe for much of October. We are speaking at a bunch of conferences [3], [4], [5], and [6] and hope to see some of you there. Since we are already on the road, we thought it would be a good opportunity to turn this into a barnstorming tour, working with teams who are looking for help with Clojure, ClojureScript, and/or Datomic. If you would like to have us work with your team, pricing is as follows: * Free for user group talks * $1500 for a 90 minute talk * $5000 for a day of training or consulting * $0 for travel expenses (we are already there!) Our prepared materials are summarized at [7] and [8], or feel free to request specific topics. If you are interested in scheduling a meeting, please send an email to i...@thinkrelevance.com, subject line: October Barnstorming. Includes in the body of the message the kind of event you are interested in, as well as possible dates and locations. Regards, Michael and Stu [1] http://thinkrelevance.com/team/members/stuart-halloway [2] http://thinkrelevance.com/team/members/michael-nygard [3] http://euroclojure.com/2013/ [4] http://reaktordevday.fi/2013/ [5] http://gotocon.com/berlin-2013/ [6] http://gotocon.com/amsterdam-2013/upcomingevents/ [7] https://github.com/stuarthalloway/presentations/wiki [8] https://github.com/mtnygard/presentations/wiki -- -- 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 unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: changing a value in a vector of maps
That's basically the same as the first solution, in terms of how it works
under the hood.
If the desire is for the output to share structure with the input, not just
the maps but the vector as well, then you need to do something a bit more
complicated. First you need to find the map you want, and return its index
in the vector (assuming it will be unique if present). Then you need to use
assoc-in with the index, like (assoc-in v [idx :c] 50) or whatever.
If there may be more than one map that should be adjusted, you could return
a seq of indices and repeatedly assoc-in, but I doubt this would give
superior efficiency unless the vector was typically huge and the number of
maps needing changes typically much smaller. With million-element vectors
and two or three maps needing updating it would likely be preferable to the
(vec (for ...)) approach. With dozen-element vectors with half a dozen maps
needing updating I'd go with (vec (for ...)).
On Tue, Jul 30, 2013 at 4:58 PM, Jim - FooBar(); jimpil1...@gmail.comwrote:
Hi,
how about
(vec
(for [{:keys [a b c] :as m} aa]
(if (= a 50) (assoc m :c 3) m)))
:)
Jim
On 30/07/13 18:53, cej38 wrote:
Suppose I have a vector of maps (this could also be a vector of records)
(def aa [{:a 0 :b 0 :c 0} {:a 50 :b 0 :c 0} {:a 100 :b 0 :c 0}])
and I want to go in an change the value of associated with :c when :a
has a value of 50, so that the final col of maps looks like
[{:a 0 :b 0 :c 0} {:a 50 :b 0 :c 3} {:a 100 :b 0 :c 0}].
I came up with a function that does this:
(defn find-assoc-in
[k v mv]
(let [f #(if (= ((first k) %) (first v))
(assoc % (second k) (second v))
%)]
(map f mv)))
(find-assoc-in [:a :c] [50 3] aa)
The problem with this function is that it potentially does a lot
of unnecessary copying of elements that aren't changed, and thus has a lot
of garbage collection. I would like help coming up with something that
does much less garbage collection.
Will someone please point out a better way of doing this?
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Re: changing a value in a vector of maps
Note: to repeatedly assoc-in over a seq of indices you'd want
(reduce #(assoc-in %1 [%2 :c] 50) input-vec index-seq)
Replace the key :c and value 50 as needed. If the 50 would actually be
computed from the index, an expression using %2 would work. If the 50 would
actually be computed from the existing value associated with the :c (or
whatever) key, use update-in instead of assoc-in and pass in the function
that transforms the existing value to the appropriate new value as the last
argument to update-in.
On Tue, Jul 30, 2013 at 6:27 PM, Cedric Greevey cgree...@gmail.com wrote:
That's basically the same as the first solution, in terms of how it works
under the hood.
If the desire is for the output to share structure with the input, not
just the maps but the vector as well, then you need to do something a bit
more complicated. First you need to find the map you want, and return its
index in the vector (assuming it will be unique if present). Then you need
to use assoc-in with the index, like (assoc-in v [idx :c] 50) or whatever.
If there may be more than one map that should be adjusted, you could
return a seq of indices and repeatedly assoc-in, but I doubt this would
give superior efficiency unless the vector was typically huge and the
number of maps needing changes typically much smaller. With million-element
vectors and two or three maps needing updating it would likely be
preferable to the (vec (for ...)) approach. With dozen-element vectors with
half a dozen maps needing updating I'd go with (vec (for ...)).
On Tue, Jul 30, 2013 at 4:58 PM, Jim - FooBar(); jimpil1...@gmail.comwrote:
Hi,
how about
(vec
(for [{:keys [a b c] :as m} aa]
(if (= a 50) (assoc m :c 3) m)))
:)
Jim
On 30/07/13 18:53, cej38 wrote:
Suppose I have a vector of maps (this could also be a vector of records)
(def aa [{:a 0 :b 0 :c 0} {:a 50 :b 0 :c 0} {:a 100 :b 0 :c 0}])
and I want to go in an change the value of associated with :c when :a
has a value of 50, so that the final col of maps looks like
[{:a 0 :b 0 :c 0} {:a 50 :b 0 :c 3} {:a 100 :b 0 :c 0}].
I came up with a function that does this:
(defn find-assoc-in
[k v mv]
(let [f #(if (= ((first k) %) (first v))
(assoc % (second k) (second v))
%)]
(map f mv)))
(find-assoc-in [:a :c] [50 3] aa)
The problem with this function is that it potentially does a lot
of unnecessary copying of elements that aren't changed, and thus has a lot
of garbage collection. I would like help coming up with something that
does much less garbage collection.
Will someone please point out a better way of doing this?
--
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Re: changing a value in a vector of maps
For a more quantitative comparison, the (reduce #(assoc-in ...)) approach
generates O(* (count index-seq) (log_32 (count input-vec))) garbage, while
the (vec (for ...)) approach, with its temporary seq the size of the
vector, and likely wholesale replacement of the vector itself (assuming you
don't keep the old version around after this), generates O(count input-vec)
garbage. They both only traverse the whole vector once, copying in one case
and building up the index-seq in the other, so they're much more even in
speed however large the vector is (both O(count input-vec)).
This is why the assoc-in approach is only really better if the vector is
considerably larger than the number of entries needing updating. Otherwise,
the (vec (for ...)) approach produces simpler, more maintainable code and
should be preferred if you never expect the vectors to grow very large, or
if you expect the proportion of items needing updating to often be a
substantial fraction of all of them.
On Tue, Jul 30, 2013 at 6:34 PM, Cedric Greevey cgree...@gmail.com wrote:
Note: to repeatedly assoc-in over a seq of indices you'd want
(reduce #(assoc-in %1 [%2 :c] 50) input-vec index-seq)
Replace the key :c and value 50 as needed. If the 50 would actually be
computed from the index, an expression using %2 would work. If the 50 would
actually be computed from the existing value associated with the :c (or
whatever) key, use update-in instead of assoc-in and pass in the function
that transforms the existing value to the appropriate new value as the last
argument to update-in.
On Tue, Jul 30, 2013 at 6:27 PM, Cedric Greevey cgree...@gmail.comwrote:
That's basically the same as the first solution, in terms of how it works
under the hood.
If the desire is for the output to share structure with the input, not
just the maps but the vector as well, then you need to do something a bit
more complicated. First you need to find the map you want, and return its
index in the vector (assuming it will be unique if present). Then you need
to use assoc-in with the index, like (assoc-in v [idx :c] 50) or whatever.
If there may be more than one map that should be adjusted, you could
return a seq of indices and repeatedly assoc-in, but I doubt this would
give superior efficiency unless the vector was typically huge and the
number of maps needing changes typically much smaller. With million-element
vectors and two or three maps needing updating it would likely be
preferable to the (vec (for ...)) approach. With dozen-element vectors with
half a dozen maps needing updating I'd go with (vec (for ...)).
On Tue, Jul 30, 2013 at 4:58 PM, Jim - FooBar(); jimpil1...@gmail.comwrote:
Hi,
how about
(vec
(for [{:keys [a b c] :as m} aa]
(if (= a 50) (assoc m :c 3) m)))
:)
Jim
On 30/07/13 18:53, cej38 wrote:
Suppose I have a vector of maps (this could also be a vector of records)
(def aa [{:a 0 :b 0 :c 0} {:a 50 :b 0 :c 0} {:a 100 :b 0 :c 0}])
and I want to go in an change the value of associated with :c when :a
has a value of 50, so that the final col of maps looks like
[{:a 0 :b 0 :c 0} {:a 50 :b 0 :c 3} {:a 100 :b 0 :c 0}].
I came up with a function that does this:
(defn find-assoc-in
[k v mv]
(let [f #(if (= ((first k) %) (first v))
(assoc % (second k) (second v))
%)]
(map f mv)))
(find-assoc-in [:a :c] [50 3] aa)
The problem with this function is that it potentially does a lot
of unnecessary copying of elements that aren't changed, and thus has a lot
of garbage collection. I would like help coming up with something that
does much less garbage collection.
Will someone please point out a better way of doing this?
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To
Re: changing a value in a vector of maps
This probably won't help with your garbage collection worries, but it's a
bit more flexible.
*(defn find-assoc-in [pred coll k v kvs]*
* (let [f #(if (pred %) (apply assoc % k v kvs) %)]*
*(into (empty coll) (map f coll*
On Tuesday, July 30, 2013 10:53:48 AM UTC-7, cej38 wrote:
Suppose I have a vector of maps (this could also be a vector of records)
(def aa [{:a 0 :b 0 :c 0} {:a 50 :b 0 :c 0} {:a 100 :b 0 :c 0}])
and I want to go in an change the value of associated with :c when :a has
a value of 50, so that the final col of maps looks like
[{:a 0 :b 0 :c 0} {:a 50 :b 0 :c 3} {:a 100 :b 0 :c 0}].
I came up with a function that does this:
(defn find-assoc-in
[k v mv]
(let [f #(if (= ((first k) %) (first v))
(assoc % (second k) (second v))
%)]
(map f mv)))
(find-assoc-in [:a :c] [50 3] aa)
The problem with this function is that it potentially does a lot
of unnecessary copying of elements that aren't changed, and thus has a lot
of garbage collection. I would like help coming up with something that
does much less garbage collection.
Will someone please point out a better way of doing this?
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[ANN] immutable-bitset: smalller, faster integer sets
https://github.com/ztellman/immutable-bitset There's not much to describe here, this provides an implementation of an integer-only set which can take up three orders of magnitude less memory under certain conditions. I needed this to implement a Bloom filter, but I figured it had applications elsewhere. If anyone has questions, I'd be happy to answer them. Zach -- -- 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 unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: [ANN] cljzmq-0.1.1 - A Clojure binding for ØMQ
Here is a simple way to send and receive Clojure data over ØMQ: https://gist.github.com/trevorbernard/6118918 On Monday, July 29, 2013 10:00:13 AM UTC-3, Trevor Bernard wrote: Hello, I'd like to announce the immediate availability of cljzmq-0.1.1 on maven central. https://github.com/zeromq/cljzmq For sample usage, I've started porting the zguide examples here: https://github.com/trevorbernard/cljzmq-examples Pull requests welcome! Warmest regards, Trev -- -- 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 unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
