Re: memorize-clj

One more reason to read Clojure's source code. Trust me, it's surprisingly easy to understand. Sent from phone. Please excuse brevity. On 29 Apr 2013 09:29, "Jorge Urdaneta" wrote: > Thank you. Shame on me > > On 28/04/13 23:28, Gary Trakhman wrote: > > Clojure has the http://clojuredocs.org/cl

[ANN] Grojure, a Java/C# syntax atop Clojure using Kern

Grojure is a Java/C#/Groovy-like syntax atop Clojure using the Kern parser combinator library. It's also of interest as an example grammar for those using Kern to build their own grammars. Available from https://github.com/gavingroovygrover/grojure Gavin "Groovy" Grover -- -- You received th

Re: memorize-clj

Thank you. Shame on me On 28/04/13 23:28, Gary Trakhman wrote: Clojure has the http://clojuredocs.org/clojure_core/clojure.core/memoize function built-in, as well as https://github.com/clojure/core.memoize for more complicated stuff. On Sun, Apr 28, 2013 at 11:51 PM, Jorge Urdaneta mailto:

Re: memorize-clj

Yes. I was suspecting clojure has something. That's why I said "Maybe reinventing the wheel here". Thank you On 28/04/13 23:27, Leonardo Borges wrote: As a matter of fact Clojure core has it :) Check it out: http://clojuredocs.org/clojure_core/clojure.core/memoize Leonardo Borges www.leonard

Re: memorize-clj

Clojure has the http://clojuredocs.org/clojure_core/clojure.core/memoize function built-in, as well as https://github.com/clojure/core.memoize for more complicated stuff. On Sun, Apr 28, 2013 at 11:51 PM, Jorge Urdaneta wrote: > Hi, > > I started a library called memorize-clj https://github.com/

Re: memorize-clj

As a matter of fact Clojure core has it :) Check it out: http://clojuredocs.org/clojure_core/clojure.core/memoize Leonardo Borges www.leonardoborges.com On Mon, Apr 29, 2013 at 1:51 PM, Jorge Urdaneta wrote: > Hi, > > I started a library called memorize-clj https://github.com/jorgeu/** > memor

memorize-clj

Hi, I started a library called memorize-clj https://github.com/jorgeu/memorize-clj It provides a function "memorize" that take a function and cache its results using guava cache. Of course the function must be pure and the parameters should be easy to compare and get a hashcode. Maybe I'm re

Re: clojure dependencies

On Friday, April 26, 2013 8:04:02 PM UTC-4, jayvandal wrote: > > I have this code. > (defproject jsql "1.0.0-SNAPSHOT" > :description "FIXME: write" > :dependencies [[org.clojure/clojure "1.4.0"]])(use 'clojure.java.jdbc) > > > My question is where do the dependencies locate? I would put the fi

Re: [ANN] Clojure Cup 2013

That looks like so much fun; can't wait! On Sunday, April 28, 2013 2:59:23 AM UTC-7, Tero Parviainen wrote: > > I've started putting together Clojure Cup, a global programming > competition for Clojure and ClojureScript programmers. The idea is to have > a 48-hour hackathon, similar to Rails Rum

Re: [ANN] repetition-hunter

Not yet, but doesn't look hard to do. Will put in the todo list. On 4/28/13, Alex Baranosky wrote: > Can it search for repetition across multiple namespaces? > > > On Sun, Apr 28, 2013 at 11:45 AM, mynomoto wrote: > >> Repetition hunter is a library to find repetitions in your code >> >> https:/

Re: Now *there*'s a machine made for Clojure.

On Apr 28, 2013, at 1:18 PM, Andy Fingerhut wrote: > > For problems that are embarassingly parallel (little or no communication or > shared memory between threads), there is no law of the universe that says > that GC must have a sequential bottleneck in it. A GC better tuned for such > proble

Re: [ANN] repetition-hunter

Can it search for repetition across multiple namespaces? On Sun, Apr 28, 2013 at 11:45 AM, mynomoto wrote: > Repetition hunter is a library to find repetitions in your code > > https://github.com/mynomoto/repetition-hunter > > Happy hunting! > > mynomoto > https://github.com/mynomoto > > -- > -

[ANN] repetition-hunter

Repetition hunter is a library to find repetitions in your code https://github.com/mynomoto/repetition-hunter Happy hunting! mynomoto https://github.com/mynomoto -- -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email

Re: Something like cond, but with test-fns

You could do it with `condp`: (condp #(%1 %2) value foo-pred? (foo-result) bar-pred? (bar-result) else? (default-result)) -S On Saturday, April 20, 2013 5:15:14 AM UTC-4, Ken Scambler wrote: > > Hi there, > I'm getting started with Clojure, and found myself really missing > Scala-style

Re: Now *there*'s a machine made for Clojure.

Ah, yes, I didn't mean to say that things are impossible, a good GC is already an example of a useful but leaky abstraction with appropriate knobs. Another example is a database like datomic. I mean that these tradeoffs and how they change with greater numbers of cores will force our hands in one

Re: Now *there*'s a machine made for Clojure.

If the issue is that the GC implementation in Oracle's JVMs typically has a sequential bottleneck in it with default parameters, then yes, Amdahl's law is striking *for that GC implementation*. For problems that are embarassingly parallel (little or no communication or shared memory between thread

Re: Now *there*'s a machine made for Clojure.

Amdahl strikes again! I knew this lunch was too tasty to be free. I just thought of another analogy. When I think of something highly concurrent and scalable on the JVM, I think of web request handlers, which effectively use no memory-sharing for domain-specific work, at all, unless there is som

Re: Now *there*'s a machine made for Clojure.

Ok, for everyone that is interested: thisthread on meetup clarified things a bit for me and probably it's a good summary on the specific case that Lee found. Il giorno domenica 28 aprile 2013 17:07:04 UTC

Re: Now *there*'s a machine made for Clojure.

I think it makes sense to consider cache-coherency and message passing to be on opposite ends of a spectrum, where with message-passing you're explicitly providing the communication protocol and giving more control, and in cache-coherent architectures you're relying on the CPU to do it for you. I

Re: Now *there*'s a machine made for Clojure.

On Apr 28, 2013, at 10:57 AM, Manuel Paccagnella wrote: > > This is an interesting perspective. Are you saying that currently Clojure > doesn't offer adequate tools to take full advantage of parallel execution on > multi-core machines? I am speaking only from my own experience, and only relat

Re: Now *there*'s a machine made for Clojure.

Il giorno domenica 28 aprile 2013 15:28:03 UTC+2, Lee ha scritto: > > > On Apr 28, 2013, at 12:34 AM, Timothy Baldridge wrote: > > > E-mail thread had less to do with issues of Clojure per se, but more > with issues the JVM had running on a 48-way machine. Or am I missing > something? > > >

Re: What Slows Down clojure-hadoop?

meant to say, uncontended atom swaps are going to be a bit slower than setting a java field, but unless you're doing a ton of them you probably wouldn't notice. On Sun, Apr 28, 2013 at 10:45 AM, Gary Trakhman wrote: > We use clojure on hadoop by using the Cascading framework, it would be > hard

Re: What Slows Down clojure-hadoop?

We use clojure on hadoop by using the Cascading framework, it would be hard to see the influence of clojure on performance because the code is complicated. But, that means clojure is used mostly to specify the Flow (a DAG construct) that Cascading provides. That's a way to use clojure that doesn'

Re: merge nested maps

Yes. On Sun, Apr 28, 2013 at 4:55 AM, Gary Verhaegen wrote: > Shouldn't that docstring read "If vals are not maps" ? > > On 25 April 2013 23:26, Stuart Sierra wrote: > > Here's a way to do it from the Pedestal demo source code: > > > > (defn deep-merge > > "Recursively merges maps. If keys ar

Re: [ANN] stories - bdd lib for clojure

Great, thanks. Now it's at https://clojars.org/stories -Steven On Sun, Apr 28, 2013 at 1:25 AM, Michael Klishin < michael.s.klis...@gmail.com> wrote: > 2013/4/28 Steven Degutis > >> I'd put it on Clojars but I can't really figure out how to deal with this >> gpg stuff. Seems way more complica

Re: What Slows Down clojure-hadoop?

HI, I come with an update. Apart from the slow startup time issue, which I can resolve by resuing JVM or enlarge the splits, there's another factor that influence performance a lot, GC. It turns out Clojure will generate a lot of transient objects, which causes frequent young gc, over five tim

Re: Now *there*'s a machine made for Clojure.

On Apr 28, 2013, at 12:34 AM, Timothy Baldridge wrote: > E-mail thread had less to do with issues of Clojure per se, but more with > issues the JVM had running on a 48-way machine. Or am I missing something? > > IIRC the Azul people played with Clojure a bit, I wonder if their suped-up > JVM

Re: Parallel let form

It is not broken. It fulfills the discussed goal of having independent parallel calls in a "let"-like macro. Thus the name plet. Using a previous binding in another binding of plet was no goal. Therefore you can use the normal "let" macro. In a library one should add the intention to use it onl

Re: recur doesn't complain when autoboxing fails?

Thank you very much, I see it now. 1. boxing means from primitive to object; unboxing is from object to primitive (I disregarded this for some reason) 2. it does say the loop arg not the recur arg: Auto-boxing loop arg: a On Sun, Apr 28, 2013 at 3:38 PM, John D. Hume wrote: > On Sun, Apr 28, 20

Re: [ANN] stories - bdd lib for clojure

On Apr 28, 2013 1:26 AM, "Michael Klishin" wrote: > > 2013/4/28 Steven Degutis >> >> I'd put it on Clojars but I can't really figure out how to deal with this gpg stuff. Seems way more complicated. Wish clojure had something easier, like homebrew and melpa. But whatever. > > > GPG signint is curr

Re: conform to interface for related multi-methods?

On Fri, Apr 26, 2013 at 11:58 AM, Steven Degutis wrote: > I found that I want to have multiple multi-methods, but grouped > together, much like an interface. > There's no syntax for grouping multimethods, but wouldn't it be good enough to put the defmulti forms near one another? Presumably they'l

Re: recur doesn't complain when autoboxing fails?

On Sun, Apr 28, 2013 at 5:46 AM, AtKaaZ wrote: > => (defn abc [] 3) > #'ants/abc > > => (loop [a 1] > (when (= 1 a) (recur (abc > NO_SOURCE_FILE:2 recur arg for primitive local: a is not matching > primitive, had: Object, needed: long > Auto-boxing loop arg: a > nil > The compiler isn't

recur doesn't complain when autoboxing fails?

=> (defn abc [] 3) #'ants/abc => (loop [a 1] (when (= 1 a) (recur (abc NO_SOURCE_FILE:2 recur arg for primitive local: a is not matching primitive, had: Object, needed: long Auto-boxing loop arg: a nil => (loop [a 1] (when (= 1 a) (recur (long (abc) nil => (loop [a 1] (whe

[ANN] Clojure Cup 2013

I've started putting together Clojure Cup, a global programming competition for Clojure and ClojureScript programmers. The idea is to have a 48-hour hackathon, similar to Rails Rumble and Node.js Knockout. Those events have been great fun, and I'm hoping we can put together something similar for

Re: conform to interface for related multi-methods?

Could you perhaps elaborate on what you would like to do that protocols do not support? On 26 April 2013 18:58, Steven Degutis wrote: > I found that I want to have multiple multi-methods, but grouped > together, much like an interface. > > Specifically, I have already-existing objects, which I wa

Re: Do functions never get inlined by jvm?

[sorry for a premature send...] I had the official documentation (http://clojure.github.io/clojure/clojure.core-api.html) open in a browser and was looking for things with plain search function of my browser. I always found the docstrings to be very clear and to the point. But then, I did it the

Re: Do functions never get inlined by jvm?

I never understood why people complain about the documentation of clojure/core. From the very beginning, I have found the docstrings to be exactly what I needed; when I first began 4clojure, I had On 26 April 2013 01:30, u1204 wrote: > ...0? :-) > > Tim Daly > > -- > -- > You received this messag

Re: merge nested maps

Shouldn't that docstring read "If vals are not maps" ? On 25 April 2013 23:26, Stuart Sierra wrote: > Here's a way to do it from the Pedestal demo source code: > > (defn deep-merge > "Recursively merges maps. If keys are not maps, the last value wins." > [& vals] > (if (every? map? vals) >