Note that you could use mapv, to perform the map but return a vector (filterv was also added at the same time).
On 16 April 2014 11:46, Kris Calabio <kriscala...@gmail.com> wrote: > I'm not exactly sure, but I think it's the use of 'conj'. My entities get > out of order if they are not vectors. > > All this might not matter though, because I've started rewriting my game > from scratch since I'm using way too many mutable atoms than is necessary. > James' screencast cleared a lot of things up for me, and I have a better > understanding about how play-clj works. > > But just to clarify, when exactly does play-clj convert the entities back > into a vector? Is it when the callback functions of the screen return? > > > On Tue, Apr 15, 2014 at 4:37 PM, Zach Oakes <zsoa...@gmail.com> wrote: > >> I see. If your code requires a vector, I think you will have to coerce >> the list each time as you are doing. Out of curiosity, what are you doing >> that makes this necessary? Are you using something like get-in? >> >> >> On Tuesday, April 15, 2014 7:11:56 PM UTC-4, Kris Calabio wrote: >> >>> In one of the callback functions in the defscreen I have a pipeline of >>> functions that do something to the entities vector and return the resulting >>> entities. I do something like this: >>> >>> (->> entities >>> (process-entities01) >>> (process-entities02) >>> (map (fn [entity] >>> (->> entity >>> (process-entity01) >>> (process-entity02))) >>> (process-entities03)) >>> >>> And that does not work, because each of the 'process-entities' functions >>> are written in a way that expect a vector as input. Likewise, they each >>> output a LazySeq unless I convert them back to a vector before returning. >>> But I can't do that for the map function in the pipeline. But this does >>> work: >>> >>> (->> entities >>> (process-entities01) >>> vec >>> (process-entities02) >>> vec >>> (map (fn [entity] >>> (->> entity >>> (process-entity01) >>> (process-entity02))) >>> vec >>> (process-entities03) >>> vec) >>> >>> >>> >>> >>> On Tue, Apr 15, 2014 at 3:34 PM, Zach Oakes <zso...@gmail.com> wrote: >>> >>>> Kris, the entities are automatically converted back into a vector by >>>> play-clj after being returned by a given function. Can you elaborate on >>>> what problem you believe is occurring when you don't change it back to a >>>> vector? >>>> >>>> >>>> On Tuesday, April 15, 2014 5:26:07 PM UTC-4, Kris Calabio wrote: >>>> >>>>> James, I have a question. I see this pattern a lot in the sample code >>>>> and in your code as well, for example: >>>>> >>>>> >>>>> >>>>> (defn- move-player [entities] >>>>> (->> entities >>>>> >>>>> (map (fn [entity] >>>>> (->> entity >>>>> >>>>> (update-player-position) >>>>> (update-hit-box)))) >>>>> >>>>> >>>>> >>>>> (remove-touched-apples))) >>>>> >>>>> >>>>> When the entities vector gets threaded through the map function, it >>>>> comes out as a LazySeq. But don't we want to keep the entities as a >>>>> vector? >>>>> This seems to be causing problems in my own code, and the only way to keep >>>>> it working is to change it back to a vector every time I do this, which >>>>> seems inelegant. Just wondering if I'm missing something. >>>>> -Kris >>>>> >>>>> >>>>> On Sun, Apr 13, 2014 at 3:13 PM, James Trunk <james...@gmail.com>wrote: >>>>> >>>>>> There's a link to a gist of >>>>>> core.clj<https://gist.github.com/Misophistful/9892203>in the video's >>>>>> description. >>>>>> >>>>>> Cheers, >>>>>> James >>>>>> >>>>>> >>>>>> On Monday, April 14, 2014 12:08:16 AM UTC+2, Kris Calabio wrote: >>>>>> >>>>>>> Actually, I thought it would be even more helpful if you had the >>>>>>> source code available (for searching/skimming). Is that somewhere >>>>>>> online? >>>>>>> -Kris >>>>>>> >>>>>>> >>>>>>> On Sun, Apr 13, 2014 at 2:47 PM, James Trunk <james...@gmail.com>wrote: >>>>>>> >>>>>>>> Hi Kris, >>>>>>>> >>>>>>>> Thanks for your comment, and I'm very glad that you found the video >>>>>>>> helpful. >>>>>>>> >>>>>>>> I started doing screencasts because I realised that I learn a new >>>>>>>> concept fastest by watching someone else doing/explaining it - and I >>>>>>>> figured I might not be the only one. Saying that, I know screencasts >>>>>>>> aren't >>>>>>>> for everyone, and they have a few drawbacks compared to text (harder to >>>>>>>> search, skim, or repeat sections). So positive comment like yours >>>>>>>> remind me >>>>>>>> that I'm not the only auditory/visual learner around here, and inspire >>>>>>>> me >>>>>>>> to keep going. Thanks! >>>>>>>> >>>>>>>> James >>>>>>>> >>>>>>>> >>>>>>>> On Saturday, April 12, 2014 11:28:29 PM UTC+2, Kris Calabio wrote: >>>>>>>>> >>>>>>>>> Great video! I've looked through Zach's examples, and even started >>>>>>>>> coding a game myself. But your screencast helped me have a better >>>>>>>>> understanding of some of the concepts and code that I was having >>>>>>>>> trouble >>>>>>>>> understanding just by looking at the example games. Thanks! >>>>>>>>> -Kris >>>>>>>>> >>>>>>>>> On Thursday, March 27, 2014 10:07:21 AM UTC-7, James Trunk wrote: >>>>>>>>>> >>>>>>>>>> Hi everyone, >>>>>>>>>> >>>>>>>>>> I thought some of you might be interested to watch my screencast >>>>>>>>>> about game development in Clojure with >>>>>>>>>> play-clj<https://www.youtube.com/watch?v=9ilUe7Re-RA> >>>>>>>>>> . >>>>>>>>>> >>>>>>>>>> Cheers, >>>>>>>>>> James >>>>>>>>>> >>>>>>>>> -- >>>>>>>> You received this message because you are subscribed to the Google >>>>>>>> Groups "Clojure" group. >>>>>>>> To post to this group, send email to clo...@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+u...@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 a topic in >>>>>>>> the Google Groups "Clojure" group. >>>>>>>> To unsubscribe from this topic, visit https://groups.google.com/d/ >>>>>>>> topic/clojure/mR1IBJ_OomY/unsubscribe. >>>>>>>> To unsubscribe from this group and all its topics, send an email >>>>>>>> to clojure+u...@googlegroups.com. >>>>>>>> >>>>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>>>> >>>>>>> >>>>>>> -- >>>>>> You received this message because you are subscribed to the Google >>>>>> Groups "Clojure" group. >>>>>> To post to this group, send email to clo...@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+u...@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 a topic in >>>>>> the Google Groups "Clojure" group. >>>>>> To unsubscribe from this topic, visit https://groups.google.com/d/to >>>>>> pic/clojure/mR1IBJ_OomY/unsubscribe. >>>>>> To unsubscribe from this group and all its topics, send an email to >>>>>> clojure+u...@googlegroups.com. >>>>>> For more options, visit https://groups.google.com/d/optout. >>>>>> >>>>> >>>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "Clojure" group. >>>> To post to this group, send email to clo...@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+u...@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 a topic in the >>>> Google Groups "Clojure" group. >>>> To unsubscribe from this topic, visit https://groups.google.com/d/ >>>> topic/clojure/mR1IBJ_OomY/unsubscribe. >>>> To unsubscribe from this group and all its topics, send an email to >>>> clojure+u...@googlegroups.com. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >>> -- >> 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 a topic in the >> Google Groups "Clojure" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/clojure/mR1IBJ_OomY/unsubscribe. >> To unsubscribe from this group and all its topics, send an email to >> clojure+unsubscr...@googlegroups.com. >> >> For more options, visit https://groups.google.com/d/optout. >> > > -- > 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/d/optout. > -- You received this message because you are subscribed to the Google Groups "Clojure" group. 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