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clojurians | clojure | are there people that set clojure to strict type checking? | 2017-11-01T06:21:16.000108 | Corazon |
clojurians | clojure | you mean typed clojure? | 2017-11-01T06:22:32.000123 | Cecilia |
clojurians | clojure | excellent comparison. by the way, your avatar is incredible. always glad to meet a fellow Dead head, especially a developer Dead head :metal: | 2017-11-01T07:51:48.000085 | Julee |
clojurians | clojure | Apart from repainting with clj colors, I've just stolen a logo with long history :slightly_smiling_face: <http://xahlee.info/UnixResource_dir/lambda_logo.html> | 2017-11-01T09:28:54.000068 | Eliana |
clojurians | clojure | I'm trying to scrape the slack logs here `<https://clojurians-log.clojureverse.org>` for a quick analysis thing but am getting a `javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure` with slurp/http-kit/clj-http. anyone know a solution for this? | 2017-11-01T09:44:30.000324 | Roscoe |
clojurians | clojure | in clojure, is it possible to use , in large numbers, like entering 1e9 as 1,000,000,000 ? | 2017-11-01T09:48:05.000191 | Berry |
clojurians | clojure | <@Berry> no, commas are equal to whitespace so they would be read as separate numbers | 2017-11-01T09:52:11.000052 | Roscoe |
clojurians | clojure | <@Roscoe>: thanks for concise explaination | 2017-11-01T09:53:14.000461 | Berry |
clojurians | clojure | <@Roscoe> `slurp` works for me:
```
(slurp "<https://clojurians-log.clojureverse.org/>")
<!DOCTYPE html>
<html>
,,,
``` | 2017-11-01T10:01:53.000404 | Terra |
clojurians | clojure | that doesn’t ring any bells for me other than the :verbose flag in require. Getting that set at the right place in your code might help. There is a particularly bad exponential problem in compilation that was fixed in the 1.9 alphas - curious if you’re using a 1.9.0 beta or 1.8.0 etc? | 2017-11-01T10:49:39.000280 | Sonny |
clojurians | clojure | is there a tool to detect unused functions in a clojure project? | 2017-11-01T10:50:42.000146 | Jena |
clojurians | clojure | Cursive colors them a gray color by default | 2017-11-01T10:57:03.000595 | Sonny |
clojurians | clojure | not sure if that’s reusing something public or not | 2017-11-01T10:57:25.000560 | Sonny |
clojurians | clojure | kibit or eastwood would be good places to look | 2017-11-01T10:57:49.000097 | Sonny |
clojurians | clojure | <@Sonny> I think Cursive uses it’s own static analysis to do that | 2017-11-01T11:07:08.000515 | Cecilia |
clojurians | clojure | that would be my suspicion too | 2017-11-01T11:07:21.000099 | Sonny |
clojurians | clojure | It can be harder than that too. Cursive colours them grey, but if you have a unit test exercising that function then it is 'used', even if it's only the test and nothing in the 'actual' codebase that uses it | 2017-11-01T11:07:25.000521 | Mallie |
clojurians | clojure | i.e. Cursive won't colour a fn grey if there is a test for it | 2017-11-01T11:07:50.000181 | Mallie |
clojurians | clojure | more incentive not to test :) | 2017-11-01T11:08:05.000113 | Sonny |
clojurians | clojure | one could theoretically write relatively easily a tool which goes through the code and finds which parts are used and which aren’t | 2017-11-01T11:08:17.000535 | Cecilia |
clojurians | clojure | that is effectively very close to tree shaking | 2017-11-01T11:08:25.000572 | Cecilia |
clojurians | clojure | I think cgrand did some work on this | 2017-11-01T11:08:43.000444 | Cecilia |
clojurians | clojure | as part of this <https://github.com/portkey-cloud/portkey> | 2017-11-01T11:09:50.000274 | Cecilia |
clojurians | clojure | I’ve done some stuff with tools.analyzer that could answer these questions, but it’s not in a consumable form atm | 2017-11-01T11:36:46.000416 | Sonny |
clojurians | clojure | <@Jena> As I recall from some months ago, I didn't see unused-function checking in kibit or eastwood. This extremely simple bash script was enough for me at the time: <https://gist.github.com/joelittlejohn/4729776> | 2017-11-01T11:37:39.000489 | Milissa |
clojurians | clojure | hey guys,
what’s the idiomatic clojure way to handle accessing a data source from multiple disparate points? say you had some data `db` and “features” `a` and `b` that needed to get into that data. on one hand it feels wrong to just use direct interactions like `get get-in` etc. we should be programming to an interface, no? on the other hand, an interface feels clunky if mostly all it’s doing is using `get get-in` itself. am I thinking about this incorrectly? | 2017-11-01T12:44:30.000536 | Jen |
clojurians | clojure | <@Jen> the data type is made of a number of interfaces | 2017-11-01T12:45:20.000542 | Margaret |
clojurians | clojure | it's considered idiomatic to put things in plain data, and access it as plain data, and not hide things with private values or accessor functions | 2017-11-01T12:46:00.000307 | Margaret |
clojurians | clojure | i see. and the “interface” to which you are programming is just stricter rules on schema mutations? such as accretion instead of deletion? | 2017-11-01T12:46:54.000434 | Jen |
clojurians | clojure | unless you made something mutable and have to prevent invalid operations... then you probably want to just do it the way you would in java, but seriously second guess whether it actually needs to be mutable | 2017-11-01T12:47:08.000492 | Margaret |
clojurians | clojure | the data structure itself, eg. hash-map, implements a number of interfaces. We use those to manage the data in the map. | 2017-11-01T12:47:40.000422 | Margaret |
clojurians | clojure | on a more abstract level there are things like spec and schema if you want to make assertions about the content and shape of the data, but honestly clojure isn't designed for making these sorts of restrictions | 2017-11-01T12:48:34.000123 | Margaret |
clojurians | clojure | it's possible, but a bit clunky, and it's easy to make a mess if you try to program with that mindset in a clojure codebase | 2017-11-01T12:49:05.000037 | Margaret |
clojurians | clojure | I think I understand. it’s a whole new world, coming from a different paradigm. I just can’t help but think about some sort of data access layer, or a (spooky) data access object. it allows you to aggregate things like logging/monitoring, and provides a “single door” through which everyone has to walk. leaving that behind feels uncomfortable | 2017-11-01T12:49:49.000340 | Jen |
clojurians | clojure | if you think giving up controlling data access is scary, just try using clojure for a while then trying to go back and write code with mutable objects again - that stuff is horrifying | 2017-11-01T12:50:59.000121 | Margaret |
clojurians | clojure | there are other languages where you both have strictness about access and types, and immutability, but they have their own trade offs too (typically clumsy and complex language design, and spending a large amount of your time trying to make the compiler happy instead of solving your problem directly) | 2017-11-01T12:52:31.000518 | Margaret |
clojurians | clojure | <https://news.ycombinator.com/item?id=15603023> <--- For those interested, we're also looking for more developers | 2017-11-01T12:52:34.000548 | Sherrie |
clojurians | clojure | on vectors, is last guaranteed to be O(1) time and pop guaranteed to be O(log_32 n) time ? | 2017-11-01T14:16:36.000317 | Berry |
clojurians | clojure | no | 2017-11-01T14:17:39.000239 | Rebeca |
clojurians | clojure | last is a seq function and is O(n) | 2017-11-01T14:18:04.000197 | Rebeca |
clojurians | clojure | and that is a feature, not a bug ^ | 2017-11-01T14:21:51.000278 | Guillermo |
clojurians | clojure | use peek for O(1) on vectors | 2017-11-01T14:32:00.000588 | Kareen |
clojurians | clojure | changed last to peek. Can someone please explain why, on vectors, it's O(n) on purpose ? | 2017-11-01T14:40:12.000548 | Berry |
clojurians | clojure | because using a seq is generic | 2017-11-01T14:41:07.000146 | Myles |
clojurians | clojure | you don't want polymorphic performance | 2017-11-01T14:45:15.000331 | Guillermo |
clojurians | clojure | Hey, Alex's tweeting has reminded me of a particular case that I find difficult to deal with in Clojure. I wonder if there's an interesting way to deal with it. | 2017-11-01T16:29:31.000039 | Detra |
clojurians | clojure | The recent example was turning nested maps which would work for transacting to Datomic except for having reverse attributes in them, into a sequence of maps which do work because they have entities broken out with forward references. | 2017-11-01T16:31:08.000165 | Detra |
clojurians | clojure | The part of it that's difficult (for me) to handle in Clojure is the recursion on a tree structure /and/ collecting multiple values. | 2017-11-01T16:32:51.000509 | Detra |
clojurians | clojure | use for | 2017-11-01T16:33:03.000026 | Rebeca |
clojurians | clojure | How would one use for? | 2017-11-01T16:33:18.000076 | Detra |
clojurians | clojure | lemme see if I have a good gist | 2017-11-01T16:33:35.000146 | Rebeca |
clojurians | clojure | <@Detra>anything that involves "complex thing on nested data structure" generally has me reaching for <#C0FVDQLQ5|specter> ; it'll probably still be somewhat complex though | 2017-11-01T16:34:15.000204 | Raul |
clojurians | clojure | ```
((fn map-paths [path m]
(if (map? m)
(for [[k v] m
i (map-paths (conj path k) v)]
i)
[[path m]]))
[]
{:a {:b 1
:c [3]}
:w {:x 1}})
([[:a :b] 1] [[:a :c] [3]] [[:w :x] 1])
``` | 2017-11-01T16:36:52.000206 | Rebeca |
clojurians | clojure | something in that style | 2017-11-01T16:36:58.000534 | Rebeca |
clojurians | clojure | <@Mallie> Good point: <https://github.com/cursive-ide/cursive/issues/1877> | 2017-11-01T16:42:15.000662 | Delois |
clojurians | clojure | Hi all, I was looking for a shortcut to see whether a key in a map was present, and was mildly surprised that this didn't work:
```
(def s [{:a 1} {:a 2} {:a 1} {:a 0}]) ; I want to filter for {:a 1}
```
Using an anonymous function is trivial:
```
user=> (filter #(= (:a %) 1) s)
({:a 1} {:a 1})
```
But I sort of expected this to work just as well, and it doesn't seem to:
```
user=> (filter (comp :a #{1}) s)
()
``` | 2017-11-01T17:48:05.000453 | Alayna |
clojurians | clojure | `(filter (comp #{1} :a) s) => ({:a 1} {:a 1})` | 2017-11-01T17:49:58.000340 | Willow |
clojurians | clojure | compose applies right to left | 2017-11-01T17:50:15.000316 | Willow |
clojurians | clojure | Oh, darn it! Got the order backwards | 2017-11-01T17:50:21.000124 | Alayna |
clojurians | clojure | `(comp fn ... f2 f1)` | 2017-11-01T17:50:26.000206 | Willow |
clojurians | clojure | simple bugs are the best bugs :slightly_smiling_face: | 2017-11-01T17:50:43.000283 | Willow |
clojurians | clojure | Awesome. Thanks <@Willow>! | 2017-11-01T17:50:44.000461 | Alayna |
clojurians | clojure | just think of compose as smashing its functions into the argument provided | 2017-11-01T17:51:21.000352 | Willow |
clojurians | clojure | 1. imagine I'm editing `foo.clj`
I can define a macro, and use it later in the same file
2. now, imagine I'm editing `foo.cljc`
and I define a macro, say via
`#?(:cljs (defmacro ...))`
now, I should be able to use this macro in `foo.cljc` on the clojure side -- but is there anyway to also use it from the cljs side?
or does cljs absolutely require macros come from other namespaces, that are pure *.clj files ? | 2017-11-01T20:16:53.000261 | Berry |
clojurians | clojure | `(binding [*out* /dev/null])`
Obviously /dev/null isn't a thing in Clojure, but how to supress stdout? Forgot | 2017-11-01T20:28:19.000072 | Kristy |
clojurians | clojure | will the output overwhelm `with-out-string ` ? | 2017-11-01T20:33:10.000044 | Berry |
clojurians | clojure | possibly not. resulting string wouln't be colossal, still I'd like to learn the cleanest pattern | 2017-11-01T20:34:03.000219 | Kristy |
clojurians | clojure | implement your own `PrintWriter` class, which does nothing | 2017-11-01T20:34:49.000039 | Torie |
clojurians | clojure | `(<http://clojure.java.io/writer|clojure.java.io/writer> "/dev/null")` too | 2017-11-01T20:35:15.000078 | Wenona |
clojurians | clojure | ```=> (binding [*out* (proxy [java.io.Writer] [] (append [& _]) (close []) (flush []) (write [& _]))] (println "hello, black hole"))
nil
``` | 2017-11-01T20:35:29.000098 | Margaret |
clojurians | clojure | <https://stackoverflow.com/questions/29914967/can-cljc-single-file-macro-definitions-to-work-with-clojurescript> <-- does this trick still work ? I'm getting 'macro not found from my cljs compilation' | 2017-11-01T22:11:07.000056 | Berry |
clojurians | clojure | I’m trying to find an article I read a while ago, told as a parable about a guy named Rich in the land of boxes, about how complex objects were and how simple composable tools could be more enjoyable | 2017-11-01T22:30:19.000076 | Deloras |
clojurians | clojure | and my google-fu is failing me… so, does anyone know this piece and can remember the title? | 2017-11-01T22:30:47.000158 | Deloras |
clojurians | clojure | <@Deloras> not referring to kingdom of nouns are you? | 2017-11-02T00:32:59.000011 | Aldo |
clojurians | clojure | That was one of Steve Yegge's big ol' rants... <http://steve-yegge.blogspot.com/2006/03/execution-in-kingdom-of-nouns.html> | 2017-11-02T00:37:54.000075 | Daniell |
clojurians | clojure | no, I very specifically remember it referring to objects as some kind of blocks or boxes, and a shout-out to Rich | 2017-11-02T00:56:44.000069 | Deloras |
clojurians | clojure | ah yeah that does sound different | 2017-11-02T01:01:26.000060 | Aldo |
clojurians | clojure | hmm, is there a plan to have <https://github.com/clojure/brew-install> in a apt/yum repository? | 2017-11-02T02:09:12.000027 | Brande |
clojurians | clojure | seeing great potential for JVM/Clojure command line scripting :slightly_smiling_face: | 2017-11-02T02:11:03.000067 | Brande |
clojurians | clojure | ah, missed this: <https://clojure.org/guides/deps_and_cli#_installation_on_linux> | 2017-11-02T02:15:03.000004 | Brande |
clojurians | clojure | hey folks - veteran c++ game engine programmer here, emacs hacker / elisp user, getting into clojure | 2017-11-02T02:24:58.000091 | Else |
clojurians | clojure | I was thinking about trying to do some kind of music visualizer (think g-force / milkdrop / etc) - what's the best approach to get framebuffer access and / or shader access in clojure? thanks in advance! | 2017-11-02T02:26:04.000032 | Else |
clojurians | clojure | <@Else> making a brower UI or desktop? | 2017-11-02T02:34:57.000104 | Cecilia |
clojurians | clojure | replacing ruby with sed from install.sh and nearly there :) | 2017-11-02T02:34:58.000052 | Brande |
clojurians | clojure | framebuffer/shader sounds like native interop | 2017-11-02T02:35:44.000099 | Brande |
clojurians | clojure | for ClojureScript you can use <https://github.com/thi-ng/shadergraph> to get easy GLSL access | 2017-11-02T02:35:49.000048 | Cecilia |
clojurians | clojure | <@Brande> GLSL is shader access | 2017-11-02T02:36:00.000130 | Cecilia |
clojurians | clojure | <@Cecilia> I'm just doing this for fun to learn the language - I love Lisp and its derivatives :slightly_smiling_face: | 2017-11-02T02:36:32.000089 | Else |
clojurians | clojure | yeah, well for ClojureScript and browsers there are several options out there, less so for Clojure | 2017-11-02T02:37:04.000043 | Cecilia |
clojurians | clojure | maybe quil? | 2017-11-02T02:37:14.000096 | Cecilia |
clojurians | clojure | I'll take a look - I mostly wondered if Clojure would even be capable of something like this given its immutable state | 2017-11-02T02:37:24.000088 | Else |
clojurians | clojure | yes it can do anything, you can ask though if Clojure is the right tool for the job | 2017-11-02T02:37:49.000194 | Cecilia |
clojurians | clojure | In this particular case I'm just doing it for fun / learning - I build game engines for a living, it's definitely not the right language for graphics, but we'll see what it can do :wink: | 2017-11-02T02:38:57.000227 | Else |
clojurians | clojure | for the performance intensive mutable data stuff your code will end up looking an awful lot like java | 2017-11-02T02:38:58.000144 | Cecilia |
clojurians | clojure | I remember John Carmack rewrote Wolfenstein 3D in Haskell, it was pure madness | 2017-11-02T02:39:22.000064 | Else |
clojurians | clojure | one could write a very efficient 3d engine with immutable data structures but only if the hardware drivers and APIs supported that properly | 2017-11-02T02:39:55.000184 | Cecilia |
clojurians | clojure | opengl etc have been written to handle this mutable state machine | 2017-11-02T02:40:10.000030 | Cecilia |
clojurians | clojure | you can also check out <https://github.com/ztellman/penumbra> | 2017-11-02T02:40:17.000236 | Jonas |
clojurians | clojure | which is no longer developed | 2017-11-02T02:40:26.000006 | Jonas |
clojurians | clojure | but maybe as a way to get started | 2017-11-02T02:40:52.000027 | Jonas |
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