ANN: Fink-Nottle 0.1.0 (async SQS + SNS client)

https://github.com/nervous-systems/fink-nottle Fink-Nottle is a non-blocking client for Amazon's SQS (queuing) and SNS (push notification) services. There's a blog post here covering the SQS portion of its functionality:

ANN: Hildebrand 0.2.2

First time caller. Hildebrand is an asynchronous pure-Clojure (i.e. no Java AWS dependencies, etc.) DynamoDB client written on top of httpkit. I've been developing it for a while now, and have used it in production, but hadn't gotten around to telling anyone about it.

Re: ANN: Hildebrand 0.2.2

amusement-to-clause ratio. (I think this should influence my own tech writing.) On Tuesday, June 2, 2015 at 2:20:59 AM UTC+2, Moe Aboulkheir wrote: First time caller. Hildebrand is an asynchronous pure-Clojure (i.e. no Java AWS dependencies, etc.) DynamoDB client written on top of httpkit

Re: Clojure on AWS Lambda?

I looked into this a little over the weekend, and wrote a small library lein template/plugin for deploying Clojurescript functions to Lambda: https://github.com/nervous-systems/cljs-lambda There's a blog post / step-by-step tutorial here:

Re: Why I'm getting NPE with zipper/next?

. hubaghd...@gmail.com wrote: Hi, I changed println to z/node , this time I'm getting: NullPointerException clojure.zip/branch? (zip.clj:73) On Friday, August 21, 2015 at 5:56:10 PM UTC+2, Moe Aboulkheir wrote: Hussein, The println inside (recur) will return nil. Take care, Moe

Re: Why I'm getting NPE with zipper/next?

Hussein, The println inside (recur) will return nil. Take care, Moe On Fri, Aug 21, 2015 at 4:35 PM, Hussein B. hubaghd...@gmail.com wrote: Hi, I have this structure: (def s [{n {id a} d 2 children [{n {id c} d 4 children []}]} {n {id b} d 3 children []}]) And I wrote a function with

Re: Why I'm getting NPE with zipper/next?

) On Friday, August 21, 2015 at 6:49:25 PM UTC+2, Moe Aboulkheir wrote: Hussein, How are you constructing your zipper, before passing it to traverse? Note that clojure.zip doesn't work on arbitrary data structures without being given some information about how to descend into/construct nodes

Re: IteratorSequence, dead code?

William, https://clojuredocs.org/clojure.core/iterator-seq previously used it, but as of this commit: https://github.com/clojure/clojure/commit/c47e1bbcfa227723df28d1c9e0a6df2bcb0fecc1 uses RT/chunkIteratorSeq http://dev.clojure.org/jira/browse/CLJ-1669 : IteratorSeq will no longer be used but

Re: Why I'm getting NPE with zipper/next?

Went off half-cocked there. The remainder: (edit-parents #(= 10 (get-in % [a b])) #(update % children reverse), data-zipper) Would have the effect of reversing the order of the children in each node which possesses a child having a b attribute set to 10. You could probably express this

Re: Why I'm getting NPE with zipper/next?

are for editing data structures but I'm not sure how to do it. Thanks for help and time. On Friday, August 21, 2015 at 7:14:13 PM UTC+2, Moe Aboulkheir wrote: Hussein, I don't get an NPE passing that to traverse, but nothing much interesting happens either. The top-level data structure

Re: Why I'm getting NPE with zipper/next?

Hussein, On Mon, Aug 24, 2015 at 5:40 PM, Hussein B. hubaghd...@gmail.com wrote: But now the updated children is using list notation, not vector. Is it ok or it is for displaying purposes? The collection type is now different, as the example I gave uses reverse as the transform, which is a

Re: partition-when?

Laurens, I don't think I've encountered an identical function I can point you to, but here's an alternative implementation: (defn partition-when [pred coll] (lazy-seq (when-let [[h t] (seq coll)] (let [[run remains] (split-with (complement pred) t)] (cons (cons h run)

Re: Examples of core.async usage in production?

I've used core.async in production a bunch with AWS. On Mon, Oct 26, 2015 at 7:24 PM, Robin Heggelund Hansen wrote: There are > postgres.async for async db, and fink-nottle for sending sms/push > notifications/email etc. using core.async. In addition to those services

Re: Trying to understand Clojure/Java concurrency performance?

On Wed, Oct 7, 2015 at 7:47 PM, Moe Aboulkheir <m...@nervous.io> wrote: > Nick, > > (There's a lot to understand about those benchmarks, and I haven't really > spent time with them, or wrk2, so feel free to ignore) > > On Wed, Oct 7, 2015 at 2:13 AM, Nick Pavlica &

Re: Trying to understand Clojure/Java concurrency performance?

On Wed, Oct 7, 2015 at 8:40 PM, Nick Pavlica wrote: > > I'm not currently planning on 1-2 million connections on a single server > at the moment. I really wish I had those problems, but I would like to > count on being able to achieve 100-200K on a single reasonably sized >

Re: Trying to understand Clojure/Java concurrency performance?

Nick, (There's a lot to understand about those benchmarks, and I haven't really spent time with them, or wrk2, so feel free to ignore) On Wed, Oct 7, 2015 at 2:13 AM, Nick Pavlica wrote: > After looking at the numbers in the benchmark, I was a little disappointed > to see

Re: palingdrome problem (4 clojure)

pty copy of x. > > Roelof > > > Op woensdag 7 oktober 2015 20:07:00 UTC+2 schreef Moe Aboulkheir: >> >> Roelof, >> >> Something like this: >> >> (defn palindrome [x] >> (if (string? x) >> (clojure.string/reverse x) >> (i

Re: palingdrome problem (4 clojure)

Roelof, Something like this: (defn palindrome [x] (if (string? x) (clojure.string/reverse x) (into (empty x) (reverse x Alternatively, you may want to consider explicitly using seq on your inputs when you get them, and using that of the basis of comparison & input to reverse. If

Re: My Zipper isn't deleting what I thought is going to delete

, 2015 at 1:59 PM, Hussein B. hubaghd...@gmail.com wrote: Thanks a lot Moe for your help. I always appreciate your patience and skills. Would you explain why your zipper works in this case? Thanks again. On Thursday, August 27, 2015 at 12:11:14 PM UTC+2, Moe Aboulkheir wrote: Hussein

Re: Generalizing - and - forms

On Fri, Aug 28, 2015 at 12:37 PM, Akhil Wali green.transis...@gmail.com wrote: This does work, but it's a bit of whammy. Anyone with suggestions for improvement? It doesn't appear to work for simple cases (where the expressions aren't function calls w/ additional arguments), e.g. (- 1 inc)

Re: Generalizing - and - forms

at 6:07:46 PM UTC+5:30, Moe Aboulkheir wrote: On Fri, Aug 28, 2015 at 12:37 PM, Akhil Wali green.tr...@gmail.com wrote: This does work, but it's a bit of whammy. Anyone with suggestions for improvement? I went over this quickly, though it seems to work OK: (defn threading [x first

Re: Generalizing - and - forms

On Fri, Aug 28, 2015 at 12:37 PM, Akhil Wali green.transis...@gmail.com wrote: This does work, but it's a bit of whammy. Anyone with suggestions for improvement? I went over this quickly, though it seems to work OK: (defn threading [x first? forms] (reduce (fn [x form] (if (seq?

Re: ANN: Fink-Nottle 0.1.0 (async SQS + SNS client)

Matthias, On Wed, Aug 26, 2015 at 9:31 AM, Matthias Diehn Ingesman matth...@ingesman.dk wrote: That looks really useful, and as far as I can tell yours is the only library for SNS. I'm considering using your library in a production app, are there any pitfalls I should be aware of? Nothing

Re: map over a Map with conditional conj

Sven, To me, the keep version would be a lot more readable if it were creating a literal map in a fn. I think (for) is almost always the right thing. It's not as fun to write, but much easier to read: (for [i (range 1 11) :let [id (keyword (str answer_correct_ i))] :when (params

Re: My Zipper isn't deleting what I thought is going to delete

Hussein, Making this change to the zipper definition: (z/zipper #(get % children) #(get % children) (fn [p c] (assoc p children c)) {children z}) looks like it'll do the right thing here. Take care, Moe On Thu, Aug 27, 2015 at 11:03 AM, Hussein B. hubaghd...@gmail.com wrote: The modify

Re: book [clojure programming] confuse

Johnny, On Tue, Sep 8, 2015 at 11:32 AM, Johnny Wong wrote: > > why " deliver a @b is going to fail " ? 1 and 2 are just two > independent threads , "deliver a 42" will unblock thread 2 , and then > thread 1 will be unblocked . > Thread 1 is waiting on delivering a

Re: Why (memoize (fn [_#] (gensym "node")) in rhizome?

On Sat, Sep 12, 2015 at 1:58 AM, Sam Ritchie wrote: > Seems like a good use of “delay”, yeah? Slightly different calling > semantics, of course, but still: > > user> (def f (delay (gensym "node"))) > #'user/f > user> @f > node3330 > user> @f > node3330 > The original code

Re: 4clojure count problem

re to put the initial value. > > These two do not work : > > (reduce (fn [counter] (inc counter)) 0 [1,2,3]) > (reduce (fn [counter] (inc counter) 0 ) [1,2,3]) > > Op zaterdag 3 oktober 2015 23:34:20 UTC+2 schreef Moe Aboulkheir: >> >> Roelof, >> >> Unless sup

Re: 4clojure count problem

Roelof, Unless supplied with an initial value, reduce will use the first value from the collection you supply - every sequence which doesn't start with "1" will give you the wrong answer. Take care, Moe On Sat, Oct 3, 2015 at 9:40 PM, Roelof Wobben wrote: > Hello, > >

Re: Testing concurrency/async features with clojure.test

Jonathon, Blocking at read time, within the test (via wrote: > If I have code in a go block or a future call, what is the best way to > automate test coverage of that code? > > -- > You received this message because you are subscribed to the Google > Groups "Clojure" group. > To post to this

Re: Generalizing - and - forms

On Fri, Aug 28, 2015 at 11:51 PM, Alan Thompson clooj...@gmail.com wrote: I have become very partial to a simple adaptation of as- from the Tupelo Core https://github.com/cloojure/tupelo library. I almost always like to be explicit about the location the previous value, since either - or -

Re: Questions about channels

I just noticed you were actually using the exit code. In that case, you probably want something like (.on p "close" (fn [exit] (put! c [:exit exit]) (a/close! c)) Take care, Moe -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this

Re: Questions about channels

On Wed, Jan 6, 2016 at 9:48 PM, wrote: > I'm using ClojureScript and nodejs and I'd like to spawn a child process > and deal with the result (stderr, stdout, exit code). > > Here's a short gist > showing an >

Re: channels 1:1, callbacks many:many ?

On Wed, Nov 25, 2015 at 6:42 AM, wrote: > > So how does one use channels if one is accustomed to registering several > callbacks to a single event? Do you have an intermediary which takes one > value from the source channel and then puts the value on as many other > channels as

[ANN] kvlt 0.1.0: JVM/Node/browser HTTP client

kvlt is an HTTP client library which runs on the JVM, Node & in browser, including support for server-sent events and websockets. Github project page Documentation & examples *Motivation*: while there exist dual-targeted

Re: grouping and mapping

As far as already existing, (grouped-map first (comp str/upper-case second) ...) or similar, with https://github.com/plumatic/plumbing/blob/master/src/plumbing/core.cljx#L164 Take care, Moe On Fri, Aug 12, 2016 at 6:10 PM, Erik Assum wrote: > I’ve been working on a new project

ANN: Shapeshiftr 0.1.0 - altcoin conversion

shapeshiftr is a Clojure/script client for the shapeshift.io cryptocurrency/altcoin exchange, which allows easy conversion of a variety of currencies (without any need for registration). The remote API is CORS-enabled - the client works in browsers

Re: Just quick review - "idiomaticy" check (Selection sort)

Here's an example w/ iterate & a simpler 'smallest': (defn- smallest [xs] (->> xs (map-indexed vector) (sort-by second) first)) (defn selection-sort [s] (->> (iterate (fn [[acc xs]] (let [[i x] (smallest xs) [l r] (split-at i xs)] [(conj acc x)

Re: Why is this not considered to be in a go block?

On Sat, Aug 27, 2016 at 12:08 AM, mond wrote: > Is that the same thing or have I made a(nother) / different mistake? > > At a glance, it looks like the functions you're passing into map and filter are shaped wrong - (comp (map sse-data) (filter matching-event-client-filter))

Re: join* tables from csv

(defn join* [d1 c1 d2 c2] (clojure.set/join (into #{} d1) (into #{} d2) {c1 c2})) Or else look at the implementation of set/join. Take care, Moe On Tue, Oct 18, 2016 at 9:41 AM, wrote: > Hey guys, i'm beginner and need help. > > I have a task: > > ;; (join*

Re: Clojure resume tips?

Jason, If it were my resumé, I would consider including only the technologies I had interest in working with professionally. Getting involved in collaborative open source development (i.e. contributing to established projects) is likely to increase your confidence, as well as that of a

Re: Hexing the Technical Interview

Love it. -- 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

Re: Contribute Specter to Clojure core?

On Sat, Mar 4, 2017 at 6:35 AM, Asim Jalis wrote: > What might be a Clojurey syntax for doing path navigation? In other words > how could get-in be extended so that it could parse nested vectors like it > parses nested maps? Thinking out aloud, an integer in the path when

Re: Reducing Jar file size for AWS Lambda

Jose, Leaving aside shrinking the jar, you could try: - Structuring your application so it's easier to construct plausible inputs in the tests / REPL - Using https://github.com/lambci/docker-lambda locally, to get an environment closer to the deployment target - Deploying to a geographically

ANN: sputter, a Clojure implementation of the Ethereum VM

I've been working on an ongoing series of blog posts documenting the development of sputter , an immutable EVM implementation Today's instalment is available here . The first post

Re: State & GUIs

It may make sense to familiarise yourself with the architecture of a Clojurescript + React web application, if that's not something you've recently investigated. Regardless of whether the techniques are directly applicable to your problem, I think the relationship between the state and the UI is

Re: Future

(doall (pmap (range ...))) may be a viable approach also, depending on the behaviour you want. On Sat, May 19, 2018 at 11:42 PM, Renata Soares wrote: > It worked, thanks! > > Em sábado, 19 de maio de 2018 19:38:28 UTC-3, Alex Engelberg escreveu: >> >> Not sure what's

Re: [ANN] Leiningen template aws-lambda-serverless

There's some casual treatment of performance in this blog post: https://nervous.io/clojure/clojurescript/aws/lambda/node/lein/2015/07/05/lambda/ For those interested in cljs, https://github.com/nervous-systems/serverless-cljs-plugin permits the deployment of cljs projects via sls. Take care, Moe

Re: OK idea to replace conj and cons with "prepend" and "append" macros that have consistent behavior and return same types as args?

On Mon, Jul 23, 2018 at 3:29 AM, Christian Seberino wrote: > This might surprise some but I actually think some things are more > elegant in Clojure than Scheme! > Expect these revelations to continue. -- You received this message because you are subscribed to the Google Groups "Clojure"

Re: OK idea to replace conj and cons with "prepend" and "append" macros that have consistent behavior and return same types as args?

Christian, Nice to have you here. I guess a couple of things are being discussed in parallel - a few trivial points: - 'you always get back a value of the concrete type you supplied for argument X' isn't obviously less cognitively burdensome than 'you always get back a sequence' - doesn't

Re: How to apply multiple values to a function

Renata, It depends on what you want to with the results of treat-request. If you don't care about them, which seems like the case: (doseq [[x y z] [x1 y1 z1] [x2 y2 z2] [x3 y3 z3]] (treat-request x y z)) Is one way to accomplish it. If you want a

Re: How to apply multiple values to a function

Missed a set of parens: On Thu, Mar 29, 2018 at 1:25 AM, Moe Aboulkheir <m...@nervous.io> wrote: > Renata, > > It depends on what you want to with the results of treat-request. If you > don't care about them, which seems like the case: > (doseq [[x y z] [[x1 y1 z1]

Re: Best way to unit test

bj, Is 'current-date' a top-level var in that file? If so, a good start might be a test which used with with-redefs to supply a contrived value for 'current-date', and then validated dates on either side of it. It may be less brittle to support

Re: [ANN] com.walmartlabs/cond-let 1.0.0

See https://funcool.github.io/cats/latest/#mlet for something closer to home, in the monadic vein. On Thu, Oct 4, 2018 at 4:10 PM Gary Trakhman wrote: > These are all just sugar over monadic bind, right? > > Here's one way to do it in the ocaml alternate universe: >

Re: The magic of Lisps

On Sun, Apr 28, 2019 at 10:46 AM Erik Assum wrote: > I see, and acknowledge that eg the go-macro core.async is a wonderful > piece of work, and that it’s really cool that it could be done in a > library. But as an application programmer, I really don’t care if it’s a > macro or a language

Re: Suspended var swaps in core.logic.nominal

According to the wiki: *In core.logic.nominal, we implement suspensions as constraints. During swapping of a and b, whenever we encounter a variable x, we replace it with a fresh variable x' and add the suspension constraint swap [a b] x' x. This swap constraint is executed under one of two

Suspended var swaps in core.logic.nominal

Afternoon, I'm new to core.logic, and was working through the αKanren paper with core.logic.nominal. On page 4, there is an example which translates to: *(l/run* [q] (n/fresh [a b](l/fresh [x y] (l/== (n/tie a (n/tie a x)) (n/tie a (n/tie