CLJS: Working with js-lib calls (?)

When you're calling functions of js-libs in clojurescript, you will face a lot of boilerplate transformations to native js-objects and/or arrays. The calls that I make start to look like: (js-lib-fn (jayq.util/clj->js param1) (jayq.util/clj->js param2) (jayq.util/clj->js param3)) where t

Re: monads

On Fri, Oct 26, 2012 at 8:39 PM, Stephen Compall wrote: > On Fri, 2012-10-26 at 09:06 -0700, Brian Craft wrote: >> First, do monads provide a generic solution, so I can apply >> f(g(h(x)))? > > Yes. control.algo.monads provides it as m-chain. Can you expand on this? If the functions are f :: a

core.logic and other types of solvers

There was a mention of linear programming in this threadabout core.logic. I wonder: Is it possible to compose the techniques? I've only just started digging into core.logic (ie today), but I've messed with less-general constrain

Re: monads

On Fri, 2012-10-26 at 09:06 -0700, Brian Craft wrote: > First, do monads provide a generic solution, so I can apply > f(g(h(x)))? Yes. control.algo.monads provides it as m-chain. The closest equivalent to m-chain in Haskell is (foldl' (>=>) return), but in most situations you would favor f =<< g

Re: with-open and line-seq

Andy, That's the "custom seq that closes the file..." I was referring to. I guess I looking for a magical line-seq that closes the file correctly even if you consume part of the sequence, is resilient to exceptions, etc, etc. I realize that it might be impossible, so I asked. :) Thanks, Dave On

Re: with-open and line-seq

Devin, did you mean read-line from the old clojure.contrib.io? http://clojuredocs.org/clojure_contrib/clojure.contrib.io/read-lines Click the "+" symbol next to "Source" to see source code, also available here: https://github.com/richhickey/clojure-contrib/blob/061f3d5b45657a89faa335ffa2bb80819f

Re: what is the simplest user auth system possible?

Another +1 for Persona. I'm the author of Refheap which uses Persona, and I chose it specifically because of how easy it was to implement and use. On Friday, October 26, 2012 3:26:16 PM UTC-5, Pierre R wrote: > > +1 for Persona. Please give your user a chance to break the cycle of > password mad

Re: with-open and line-seq

I usually wind up with the line-seq from old contrib. Could you be more clear about what isn't satisfying about that? For me it usually boils down to: it's unsatisfying that core line-seq doesn't do that by default. '(Devin Walters) On Oct 26, 2012, at 6:45 PM, Dave Ray wrote: > Hi, > > At w

Re: let in the middle of thread-first

Appreciate everyone's responses! I'll certainly check out the let-> option. jason On Friday, October 26, 2012 6:16:28 AM UTC-7, Jonathan Fischer Friberg wrote: > > You could also let every function take a map as input/output. > Then, b could return a map with key :result-b or similar. > This res

with-open and line-seq

Hi, At work I've had a few conversations about treating files, especially large ones, as seqs of lines. In particular, the apparent conflict between using clojure.core/with-open to ensure a file is closed appropriately, and clojure.core/line-seq as a generic sequence of lines which may be consumed

ANN: core.logic-0.8.0-beta2

Enhancements: - experimental support for Datomic - eqfd now supports - & / Fixes: - distinctfd goal behaved badly if argument wasn't ground - LOGIC-62: distincto bug reveals much larger issues around how we look up constraints. because vars can be bound in any order and we use vars to map to const

Re: Has anyone posted with Clojurescript (XhrIo) to a non Clojure based web framework?

> (.send goog.net.XhrIo action callback 'POST' serialized ))) You are using the clojure symbol 'POST' not the string "POST". Switch to double quotes and I bet it works. jack. -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this g

Has anyone posted with Clojurescript (XhrIo) to a non Clojure based web framework?

Can't seem to get it to work. Have tried posting to a .Net Mvc 4 action, and a Ruby/Rails action. Have had no success at all. It attempts and then just throws an exception: "SYNTAX_ERR: DOM Exception 12" "Error: An invalid or illegal string was specified." Problem is, that doesn't really help

Re: what is the simplest user auth system possible?

+1 for Persona. Please give your user a chance to break the cycle of password madness ;-) On Friday, October 26, 2012 1:10:42 PM UTC+2, Dave Sann wrote: > > Sorry, I meant to say authentication. > > On Friday, 26 October 2012 22:06:48 UTC+11, Dave Sann wrote: >> >> For authorisation, I really lik

Re: monads

On Oct 26, 2012, at 11:06 AM, Brian Craft wrote: > I've read about four tutorials on monads so far, but it still escapes me. > > In fact, I'm still not sure what problem it solves. Monads are hard to understand, and I too found I wasn't the target audience for the explanations I read. I final

Re: monads

I can't say I grok monads completely yet, but was one of the tutorials you read this one? http://blog.sigfpe.com/2006/08/you-could-have-invented-monads-and.html I like the style of showing how they solve problems that arise naturally in the context of purely functional programming, with several

Re: [core.logic] How to implement "synthetic" answers?

On Fri, Oct 26, 2012 at 4:16 AM, Tassilo Horn wrote: > Any ideas and pointers how to implement that? > I don't really see anyway to do this without the graph itself being a relational data structure. I haven't seen any data structure that fits that bill beyond lists (which of course can be used

compare doubles for equality fn

Can someone recommend a library that contains a function comparing doubles for equality? This clojure cookbook has a section on comparing floating-point numbers. http://www.gettingclojure.com/cookbook:numbers This blog post makes me want to find an implementation by someone who has more experi

monads

I've read about four tutorials on monads so far, but it still escapes me. In fact, I'm still not sure what problem it solves. I'm familiar with the problem of having, say, three functions like f(a) -> b, g(c) -> d, h(e) -> f, which you'd like to chain like f(g(h(x))), but you can't because b is

[ANN] Typed Clojure 0.1, analyze 0.2

Hi, I've cleaned up a release of Typed Clojure to coincide with my dissertation (also released another version of analyze). Please try it out. (Clojure 1.5.0-beta1 only) Typed Clojure 0.1 https://github.com/frenchy64/typed-clojure [typed "0.1"] analyze 0.2 https://github.com/frenchy64/analy

Re: fastest way to remove nils

No problem, however this nuance has broader implications than just this code snippet :) If you pass false and nil values to a library and expect them to be processed differently, you may end up with a big surprise. Luc > The difference between nil and false is really handy in some cases > and f

Re: fastest way to remove nils

The difference between nil and false is really handy in some cases and for many people removing nil (or keeping not-nil) values from a seq is not removing falsy values. I just wanted to point out the issues that may arise from a blind use of (filter identity [...]) ;) On Friday, October 26, 2012

Re: fastest way to remove nils

I avoid making explicit distinctions between false and nil in my code. In Clojure a falsy value is either nil or false. In interop I ensure that null and false when returned in the upper layers are made consistent (including Boolean objects set to false). Too much potential trouble in my opinion

Re: Clojurescript externs when using a local file (cljsbuild)

Awesome. Thanks. On Friday, October 26, 2012 12:30:07 AM UTC-4, Evan Mezeske wrote: > > One other thing I ought to mention is that your *.cljs files need to be > arranged in an appropriate directory structure (i.e. the directories must > match the namespaces): > > /src-cljs/live/helper/webTempla

Re: ANN: data.json 0.2.0

It is done. data.json 0.2.1 coming to a repository near you. http://build.clojure.org/job/data.json/77/ https://github.com/clojure/data.json/tree/data.json-0.2.1 -S -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email t

Re: compile fails but stack trace does not mention a line of code in my app

I've seen this error when putting the function name *after* the docstring instead of before in a defn. Stathis On Thursday, 25 October 2012 20:05:25 UTC+1, Philip Potter wrote: > > Since we're wild mass guessing, I'd say from that stack trace that there's > invalid syntax in a defn's signature

Re: let in the middle of thread-first

You could also let every function take a map as input/output. Then, b could return a map with key :result-b or similar. This result would then pass through the rest of the functions and be accessible in e. Like this: a ; => {:result-a ...} b ; => {:result-b ... :result-a ...} ... d ; => {... :resu

Re: ANN: Guzheng 1.2.5

Tassilo: I've incorporated this fix and rereleased as [lein-guzheng 1.4.4] (which will automatically pull in the latest guzheng). Ambrose: Guzheng works by instrumenting all code just before it's eval'ed, using Zach Tellman's sleight library, which is essentially a way to do whole program macro

Re: fastest way to remove nils

(filter (comp not nit?) [nil 2 3 nil false true 4]) -> (remove nil? [...]) On Fri, Oct 26, 2012 at 12:53 PM, kevin roth wrote: > Be careful with the (filter identity ...) which will also remove "falses" > from seqs. > (filter identity [nil 2 3 nil false true 4]) > => (2 3 true 4) > Since (identit

Re: fastest way to remove nils

Be careful with the (filter identity ...) which will also remove "falses" from seqs. (filter identity [nil 2 3 nil false true 4]) => (2 3 true 4) Since (identity false) and (identity nil) returns respectively false and nil they are BOTH rejected by filter. This could do the trick: (filter (comp

Re: what is the simplest user auth system possible?

Sorry, I meant to say authentication. On Friday, 26 October 2012 22:06:48 UTC+11, Dave Sann wrote: > > For authorisation, I really like mozilla persona (previously browserid) > which I discovered from refheap. javascript lib plus an http request from > the server to validate. really simple. > >

Re: what is the simplest user auth system possible?

For authorisation, I really like mozilla persona (previously browserid) which I discovered from refheap. javascript lib plus an http request from the server to validate. really simple. https://login.persona.org/ Dave On Friday, 26 October 2012 01:35:53 UTC+11, Stephen Compall wrote: > > On O

Re: ANN: Guzheng 1.2.5

David Greenberg writes: Hi David, > Guzheng is a library for doing branch coverage analysis on Clojure > projects at the command line. Hey, that's pretty cool. But it errors when being applied to my project. I've found the bug in guzheng and already sent you a pull request. Bye, Tassilo --

[core.logic] How to implement "synthetic" answers?

Hi all, I successfully use core.logic to query a custom Java graph structure. That is, I have these core relations: , | (typeo g e t) | e is a vertex or edge of graph g with type t | | (vertexo g v) | v is a vertex of graph g | | (edgeo g e s t) | e is an edge of graph g starting at vertex