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clojurians | clojure | As a sub-routine, doesn’t it bother anyone ? | 2017-12-09T11:43:43.000046 | Olen |
clojurians | clojure | Done and done! <https://ajpierce.github.io/posts/ethereum-blockchain-clojure/> | 2017-12-09T12:50:45.000137 | Alexander |
clojurians | clojure | Thanks again for the help! :slightly_smiling_face: | 2017-12-09T12:50:51.000111 | Alexander |
clojurians | clojure | does anybody know of any nice documentation around creating a custom implementation of Spec/Specize from clojure.spec.alpha? I can find one gist in all the web of someone that's attempted it. | 2017-12-09T13:06:49.000119 | Twyla |
clojurians | clojure | it’s not documented because we don’t want to encourage you to do that | 2017-12-09T14:33:19.000033 | Sonny |
clojurians | clojure | in general, you should either be plugging predicates into the specs (use any predicate you like) or combining the things that are provided, which cover the possible data structures appropriately | 2017-12-09T14:34:03.000112 | Sonny |
clojurians | clojure | while I expect the spec api to stay pretty similar, the internals of spec are going to change, so whatever you write is almost certain to be broken. when we consider spec final, there may be more docs at that time on how to create custom spec types. | 2017-12-09T14:35:05.000084 | Sonny |
clojurians | clojure | What's with those new cli tools released with clojure 1.9? What Gap are they trying to fill? | 2017-12-09T15:05:36.000080 | Vernice |
clojurians | clojure | Have you read <https://clojure.org/guides/deps_and_cli> and <https://clojure.org/reference/deps_and_cli> ? They try to answer this question. | 2017-12-09T15:07:50.000056 | Sonny |
clojurians | clojure | <@Sonny> skimmed :simple_smile: . But, are they trying to replace lein/boot? | 2017-12-09T15:10:57.000107 | Vernice |
clojurians | clojure | No | 2017-12-09T15:11:08.000081 | Sonny |
clojurians | clojure | They do not build or deploy artifacts | 2017-12-09T15:11:24.000050 | Sonny |
clojurians | clojure | They are for building classpaths and launching Clojure programs | 2017-12-09T15:12:32.000012 | Sonny |
clojurians | clojure | Thanks <@Sonny> . I'll read it through. | 2017-12-09T15:12:42.000069 | Vernice |
clojurians | clojure | <@Olen> The answer to your earlier question -- about the difference in behavior of `(list? (cons stuff))` in clj and cljs -- is basically due to how the `Cons` type is defined on both sides. In clj, `(list? thing)` asks if `thing` implements `IPersistentList`. clj `Cons` is `java.lang.Cons`, which does not implement that interface, or inherit from anything that does; that's why it returns false on the clj side. In cljs, `(list? thing)` asks if `thing` "implements" (`satisfies?`) `IList`. cljs `Cons` is explicitly defined to implement that interface, so it returns true. | 2017-12-09T17:06:33.000045 | Clifton |
clojurians | clojure | <@Olen> see <https://github.com/clojure/clojure/blob/master/src/jvm/clojure/lang/Cons.java#L17> for the definition on the clj side | 2017-12-09T17:08:19.000085 | Clifton |
clojurians | clojure | <@Olen> <https://github.com/clojure/clojurescript/blob/master/src/main/cljs/cljs/core.cljs#L3180> for the cljs | 2017-12-09T17:10:14.000045 | Clifton |
clojurians | clojure | <@Clifton> good explanation. That brings up something I’ve wondered - why `java.lang.Cons` doesn’t impl `IPersistentList` | 2017-12-09T17:21:22.000057 | Petronila |
clojurians | clojure | <@Petronila> because IPersistentList is counted and that demands O(1) counting. Cons cells can be lazy and are O(n) counted. | 2017-12-09T17:33:53.000010 | Sandy |
clojurians | clojure | <@Sandy> where in `public interface IPersistentList extends Sequential, IPersistentStack` are they counted? | 2017-12-09T17:35:02.000052 | Petronila |
clojurians | clojure | I know it has the `IPersistentCollection.count()` | 2017-12-09T17:35:16.000048 | Petronila |
clojurians | clojure | that's it | 2017-12-09T17:35:32.000072 | Sandy |
clojurians | clojure | however, I didn’t think that was the same as `clojure.lang.Counted` | 2017-12-09T17:35:53.000060 | Petronila |
clojurians | clojure | I didn’t know it had any sort of stipulation that is | 2017-12-09T17:36:04.000027 | Petronila |
clojurians | clojure | yeah all the interfaces are O(1), Clojure papers over that with `count` in clojure.core | 2017-12-09T17:37:17.000087 | Sandy |
clojurians | clojure | Either way, I guess I’m getting the general idea that a `Cons` can be some unbounded lazy thing, where a “list” is expected to not be, I guess | 2017-12-09T17:37:31.000073 | Petronila |
clojurians | clojure | exactly | 2017-12-09T17:37:43.000074 | Sandy |
clojurians | clojure | all that is a bit cleaner in ClojureScript | 2017-12-09T17:38:11.000094 | Sandy |
clojurians | clojure | sideffect of reimplementing the lib | 2017-12-09T17:38:17.000111 | Sandy |
clojurians | clojure | sure | 2017-12-09T17:39:03.000053 | Petronila |
clojurians | clojure | Well, good to know. Thanks for the insight | 2017-12-09T17:39:17.000063 | Petronila |
clojurians | clojure | <@Clifton> I looked the documentations before but your message is so clear and it helped me to clear some questions on my mind. If you know any tricks like that. Please mesaage me, I am documenting these tricks. | 2017-12-09T17:51:07.000041 | Olen |
clojurians | clojure | Is there a standard way of storing a Directed Acyclic Graph in an Entity-Attribute-Value store ? | 2017-12-09T23:26:54.000049 | Berry |
clojurians | clojure | an adjacency list would be a simple way to do it | 2017-12-09T23:27:53.000059 | Margaret |
clojurians | clojure | do you store the child list as a single vector, and when you add/del one child, overwrite the entire vector ? | 2017-12-09T23:29:35.000028 | Berry |
clojurians | clojure | that's an implementation decision, the totally denormalized version would be to make each child relation a separate entry | 2017-12-09T23:30:31.000001 | Margaret |
clojurians | clojure | I think | 2017-12-09T23:30:38.000070 | Margaret |
clojurians | clojure | hello every one, I'm starting to learn clojure (my first real functional language) after doing some functional JS | 2017-12-09T23:35:30.000031 | Cleopatra |
clojurians | clojure | do you recomend any sql abstractions to use in my project with postgres? | 2017-12-09T23:36:12.000007 | Cleopatra |
clojurians | clojure | I saw korma, but looks like it is abandoned, and I didn't like the yesql and hugsql approach | 2017-12-09T23:37:07.000083 | Cleopatra |
clojurians | clojure | <@Cleopatra> I'd recommend HoneySQL which lets you compose query fragments, on top of `clojure.java.jdbc` which is the Clojure Contrib library for JDBC operations. | 2017-12-10T00:06:19.000031 | Daniell |
clojurians | clojure | Also <@Cleopatra> since you're new to Clojure and interested in SQL, I'll recommend the <#C053AK3F9|beginners> and <#C1Q164V29|sql> channels. | 2017-12-10T00:07:18.000027 | Daniell |
clojurians | clojure | Is there a clojure tool that will take a codebase, and show me all defns / defs taht are not used?
It can assume I'm not doing something weird via string->symbol->resolve-in-ns | 2017-12-10T00:13:46.000055 | Berry |
clojurians | clojure | Yagni. | 2017-12-10T00:14:33.000009 | Daniell |
clojurians | clojure | <https://github.com/venantius/yagni> | 2017-12-10T00:15:00.000061 | Daniell |
clojurians | clojure | is boot-check the closest for boot ? | 2017-12-10T00:15:01.000047 | Berry |
clojurians | clojure | yagn ieems to depend on lein | 2017-12-10T00:15:09.000013 | Berry |
clojurians | clojure | $ boot check/with-yagni
latest report from yagni.... [You Rock!] | 2017-12-10T00:15:37.000005 | Berry |
clojurians | clojure | Yes, `boot-check` runs Yagni | 2017-12-10T00:15:37.000067 | Daniell |
clojurians | clojure | Gorilla REPL crashes every time when I use it on my Mac. | 2017-12-10T02:22:24.000053 | Lawerence |
clojurians | clojure | Does anyone else have the same problem? | 2017-12-10T02:22:34.000024 | Lawerence |
clojurians | clojure | <@Lawerence> Use `:plugins [[lein-gorilla "0.4.0"]]` instead of `:plugins [lein-gorilla "0.4.0"]` | 2017-12-10T02:47:30.000009 | Heriberto |
clojurians | clojure | How do people feel about doing things like http requests inside of `dosync`, for example? | 2017-12-10T03:20:51.000015 | Martina |
clojurians | clojure | I find myself in a situation where I am receiving many (kafka) messages asynchronously, any of which triggers a particular http call. But I only want to make that call once. | 2017-12-10T03:21:46.000061 | Martina |
clojurians | clojure | So, I receive the message, `dosync` to assoc something under a key and trigger a request *only if that key doesn’t exist yet* | 2017-12-10T03:23:53.000070 | Martina |
clojurians | clojure | Can I do this without triggering a request inside the dosync? | 2017-12-10T03:24:08.000002 | Martina |
clojurians | clojure | Ah, `dosync` may retry anyway, so that doesn’t work | 2017-12-10T03:34:42.000006 | Martina |
clojurians | clojure | Hmmm, how do I avoid the race condition here: `deref` to see if key exists, if not `dosync` to add key and then (at some point) trigger request | 2017-12-10T03:38:22.000028 | Martina |
clojurians | clojure | Multiple threads could `deref` and see the missing key, both add the key and trigger request, unless those are somehow a single transaction | 2017-12-10T03:39:31.000024 | Martina |
clojurians | clojure | I guess in a single `dosync` it can check the key and add it in, no need for a separate `deref` | 2017-12-10T03:40:36.000063 | Martina |
clojurians | clojure | the question is when the request is triggered to guarantee it only happens once | 2017-12-10T03:41:03.000030 | Martina |
clojurians | clojure | Maybe this is finally a use case for agents | 2017-12-10T03:44:14.000006 | Martina |
clojurians | clojure | Ah that is actually a quite elegant solution | 2017-12-10T03:55:45.000019 | Martina |
clojurians | clojure | I finally understand what agents are for | 2017-12-10T03:56:16.000022 | Martina |
clojurians | clojure | generic question. Say I’m building a library and in the default namespace I need an instance of a parser. I will need this parser for every call into the library. I could have a `(def parser ...)` directly in the main namespace of the library, but for some fuzzy reason this makes me feel slightly dirty and I would feel more pure with lets say a memoized function returning the parser. Opinions? Is it ok and good style to just `(def ` things or is it indeed somehow better to keep things in functions? One difference I see is that the def gets potentially ’unnecessarily` evaluated on load. The user of my lib might elect to not call any functions in my namespace etc... | 2017-12-10T03:59:58.000048 | Joette |
clojurians | clojure | <@Joette> Could use <https://github.com/stuartsierra/component> to avoid re-defining global variables on load. | 2017-12-10T04:05:15.000032 | Heriberto |
clojurians | clojure | That's what was recommended to me instead of global atoms | 2017-12-10T04:05:44.000031 | Heriberto |
clojurians | clojure | cloc dumps ttl lines, ttl white space, ttl comments
is there some other tool that will dump ttl + also summaries for each file ? | 2017-12-10T05:14:53.000072 | Berry |
clojurians | clojure | i.e. I want a table of four columns: file name, comments, whitespace, line-count // though two clumns of just filename and line-count is fine, if it's better than wc -l | 2017-12-10T05:15:25.000058 | Berry |
clojurians | clojure | I do that. The repl starts and works for some time and then it stops working.
Now I don’t seem to have that problem. | 2017-12-10T07:22:51.000073 | Lawerence |
clojurians | clojure | `cloc --by-file`? | 2017-12-10T07:27:35.000034 | Noella |
clojurians | clojure | or use <https://github.com/Aaronepower/tokei>, much much faster | 2017-12-10T07:27:57.000070 | Noella |
clojurians | clojure | `tokei -f` gets you a per-file summary | 2017-12-10T07:28:12.000053 | Noella |
clojurians | clojure | Good Morning Everybody :slightly_smiling_face: | 2017-12-10T12:10:26.000007 | Magda |
clojurians | clojure | <@Noella>: `cloc --by-file` is awesome; thanks! | 2017-12-10T13:33:07.000118 | Berry |
clojurians | clojure | besides fn -> `\lambda` is there a standard set of "prettify these clojure keyword" setup ? | 2017-12-10T14:21:55.000014 | Berry |
clojurians | clojure | some setups also prettify `#{}` | 2017-12-10T14:23:07.000053 | Kristy |
clojurians | clojure | Sorry guys but I still cannot understand what those cmd line tool just released <https://clojure.org/reference/deps_and_cli> here are for. What gap did I have that they are trying to fill? | 2017-12-10T14:27:50.000014 | Vernice |
clojurians | clojure | they are for people who have never tried clojure and want something minimal to fire it up | 2017-12-10T14:28:28.000051 | Margaret |
clojurians | clojure | <@Sonny> pointed me to <https://clojure.org/guides/deps_and_cli>.
But if I have leiningen, what do i need those for? | 2017-12-10T14:29:26.000015 | Vernice |
clojurians | clojure | you don't, and it's not for you | 2017-12-10T14:29:37.000061 | Margaret |
clojurians | clojure | it's for people who haven't used clojure and want a simple way to fire up a clojure repl. Or people who want something ligher weight / more targetted than lein or boot for running a repl. | 2017-12-10T14:30:22.000012 | Margaret |
clojurians | clojure | I also get the impression that they provide an official solution from the clojure team for launching a clojure repl. Previously it was sufficiently simple to not matter. | 2017-12-10T14:30:41.000071 | Jodie |
clojurians | clojure | in the past we could use clojure.jar for that, clojure.jar no longer runs standalone because of clojure.spec.alpha | 2017-12-10T14:30:49.000083 | Margaret |
clojurians | clojure | Like people have a python repl | 2017-12-10T14:31:43.000059 | Vernice |
clojurians | clojure | right, python just runs as a standalone command | 2017-12-10T14:31:55.000135 | Margaret |
clojurians | clojure | dumb question: why does clojure.spec.alpha prevent clojure.jar from being standalone ? | 2017-12-10T14:32:42.000001 | Berry |
clojurians | clojure | because it's not part of clojure.core, it's a separate artifact | 2017-12-10T14:33:01.000096 | Margaret |
clojurians | clojure | so you need to construct a classpath with at least three artifacts to make it work iirc | 2017-12-10T14:33:17.000069 | Margaret |
clojurians | clojure | you can't just 'stuff it in the *.jar" ? I thought jars were just zips/tar files and you could throw stuff into it | 2017-12-10T14:34:03.000093 | Berry |
clojurians | clojure | <@Berry> That leads to a classpath conflicts. | 2017-12-10T14:34:27.000003 | Jodie |
clojurians | clojure | And tools.deps.alpha? | 2017-12-10T14:34:33.000077 | Vernice |
clojurians | clojure | deps.alpha knows how to resolve deps, that is why it is there | 2017-12-10T14:34:51.000117 | Margaret |
clojurians | clojure | it helps construct a classpath and download jars that you might need | 2017-12-10T14:35:07.000065 | Margaret |
clojurians | clojure | Isn't that what mvn is for? | 2017-12-10T14:35:17.000137 | Vernice |
clojurians | clojure | but unlike lein or boot it isn't for packaging or deploying and doesn't have tooling for plugins | 2017-12-10T14:35:30.000103 | Margaret |
clojurians | clojure | yes, you could use mvn for that, but then you need an mvn command for running clojure | 2017-12-10T14:35:51.000067 | Margaret |
clojurians | clojure | and mvn is also a packaging and plugin and deployment tool like leiningen or boot are | 2017-12-10T14:36:18.000013 | Margaret |
clojurians | clojure | Thanks <@Margaret> I was afraid I am missing something here. | 2017-12-10T14:37:02.000022 | Vernice |
clojurians | clojure | is there a builtin for
(magic [f1 f2 f3 f4] [x1 x2 x3 x4]) => [(f1 x1) (f2 x2) (f3 x3) (f4 x4)] } | 2017-12-10T14:40:56.000116 | Berry |
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