As part of a project to help me learn Clojure, I'm trying to send an
email using code like
http://nakkaya.com/2009/11/10/using-java-mail-api-from-clojure/.
For the JavaMail API I'm using GNU JavaMail, which in turn requires
GNU JAF (activation.jar). When I try to run my program, I get:
I would like to have a function that returns the next binary byte of a
file.
I tried
(defn reader (file)
(let [in (new java.io.FileInputStream file]
#(. in (read
The idea is that I could call this function once and it would return a
closure
over the 'in' object. Then I could simply
As a bit of a newbie to the functional + identity/state design space,
I'm struggling a bit with where to use identity constructs (refs) and
where to stay with pure functions, and could use some guidance. Pardon
me if some of my terms are a bit off. Here is a simple hypothetical
app for matching
Sorry my english
I use in my small clojure program one complicated mutually-recursive
data structure that represents an agent-in-environment. This structure
is clojure agent which have self-reference inside himself and
reference to environment, where environment is set of agents:
(let [a (agent
Hi everyone,
if I run this code:
(defprotocol P
(foo [x]))
(deftype T []
P
(foo [] dummy))
(extends? P T)
;== nil
(satisfies? P T)
;== nil
(extenders P)
;==nil
are they not yet implemented?
anyway when I run
(type P)
;== clojure.lang.PersistentArrayMap
So the protocol is simply a
On 2 March 2010 17:40, Michael Gardner gardne...@gmail.com wrote:
As part of a project to help me learn Clojure, I'm trying to send an
email using code like
http://nakkaya.com/2009/11/10/using-java-mail-api-from-clojure/.
For the JavaMail API I'm using GNU JavaMail, which in turn requires
Hi,
On Mar 2, 10:57 pm, TimDaly d...@axiom-developer.org wrote:
(defn reader (file)
(let [in (new java.io.FileInputStream file]
#(. in (read
The arguments a written in a vector not a list:
(defn reader
[file] ; - note vectpr
(...))
Sincerely
Meikel
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On Wed, Mar 3, 2010 at 8:43 AM, Andrea Tortorella elian...@gmail.comwrote:
Hi everyone,
if I run this code:
(defprotocol P
(foo [x]))
(deftype T []
P
(foo [] dummy))
(extends? P T)
;== nil
(satisfies? P T)
;== nil
(extenders P)
;==nil
are they not yet implemented?
Nil
On 03.03.2010, at 14:43, Andrea Tortorella wrote:
(extends? P T)
;== nil
(satisfies? P T)
;== nil
(extenders P)
;==nil
The doc string of both extends? and extenders refers to types explicitly
extending a protocol. My understanding is that this excludes protocols
implemented via their
Hi Andrea,
You need to make two little changes: (1) satisfies? is a predicate
about instances, not types, and (2) the extend predicates check for
explicit extension:
(defprotocol P
(foo [x]))
(deftype T [])
(extend ::T
P
{:foo (fn [] dummy)})
(extends? P T)
= true
(satisfies? P
Hi,
On Mar 3, 2:43 pm, Andrea Tortorella elian...@gmail.com wrote:
You have to use some instance of T.
(extends? P T)
;== nil
(extends? P some-t) will return false, because you don't call extend
explicitly.
(satisfies? P T)
;== nil
(satisfies? P some-t) will return true.
(extenders P)
I'm not on my machine so i'cant experiment, i tried on #clojure with
clojurebot but it's not 1.2, so i ask here,
given that a protocol is represented as a simple map, which is the
way to know if something is infact a protocol.
Or suppose i want to add a function that works on protocols how can i
Sorry, that was a transcription error. My common-lisp is showing.
The original source has square brackets.
The issue seems to be that something internal to Clojure does
not implement the ISeq interface. Why it wants to find an
ISeq interface on Symbol is unclear. The symbol in should
be part of
One aspect of your question that makes it difficult to answer is that
you don't explain what the repercussions should be (in terms of
synchronization) when a new applicant or job enters the pool or a new
skill is attributed to an applicant. Should the job-applicant
matching function be restarted?
On 2 March 2010 23:57, TimDaly d...@axiom-developer.org wrote:
I would like to have a function that returns the next binary byte of a
file.
I tried
(defn reader (file)
(let [in (new java.io.FileInputStream file]
#(. in (read
The idea is that I could call this function once and it
On 03.03.2010, at 16:05, Andrea Tortorella wrote:
given that a protocol is represented as a simple map, which is the
way to know if something is infact a protocol.
I don't think that is possible without relying on undocumented characteristics
that are likely to change. What do you need this
I've been reading through the examples of OO in clojure using multi-
methods and they certainly seem very flexible and powerful. I'm
wondering, however, how people handle interface library design. If
people can implement objects as maps, structs, or just about
anything else you can discriminate
On Mar 3, 2010, at 8:42 AM, Michael Wood wrote:
On 2 March 2010 17:40, Michael Gardner gardne...@gmail.com wrote:
As part of a project to help me learn Clojure, I'm trying to send an
email using code like
http://nakkaya.com/2009/11/10/using-java-mail-api-from-clojure/.
For the JavaMail API
Works for me now. No idea what changed. Different day. Sigh.
On Mar 3, 12:07 pm, Michael Wood esiot...@gmail.com wrote:
On 2 March 2010 23:57, TimDaly d...@axiom-developer.org wrote:
I would like to have a function that returns the next binary byte of a
file.
I tried
(defn reader
On Mar 3, 7:47 pm, cageface milese...@gmail.com wrote:
I've been reading through the examples of OO in clojure using multi-
methods and they certainly seem very flexible and powerful. I'm
wondering, however, how people handle interface library design. If
people can implement objects as maps,
On Mar 2, 8:34 pm, Sophie itsme...@hotmail.com wrote:
Do I design a single World ref whose state changes with time to
different worlds, so adding a new Applicant or even adding a new Skill
to an existing Applicant results in a new World value? Or is it better
to have an Applicants ref and a
On Mar 3, 2:05 pm, Jarkko Oranen chous...@gmail.com wrote:
Well, it seems to me that the universal interface is the sequence.
Turns out many things can be represented as sequences. :) And since
maps are just collections of key/value pairs, very generic code can be
written to process them, too.
Just a reminder: tomorrow night we're having a meeting of Seajure, the
Seattle Clojure group.
7:00 pm at University Zoka
On Wed, 3 Mar 2010 09:47:09 -0800 (PST)
cageface milese...@gmail.com wrote:
I've been reading through the examples of OO in clojure using multi-
methods and they certainly seem very flexible and powerful. I'm
wondering, however, how people handle interface library design. If
people can
On Wed, 3 Mar 2010 14:20:56 -0800 (PST)
Armando Blancas armando_blan...@yahoo.com wrote:
On Mar 2, 8:34 pm, Sophie itsme...@hotmail.com wrote:
Do I design a single World ref whose state changes with time to
different worlds, so adding a new Applicant or even adding a new Skill
to an
On 3 March 2010 04:34, Sophie itsme...@hotmail.com wrote:
As a bit of a newbie to the functional + identity/state design space,
I'm struggling a bit with where to use identity constructs (refs) and
where to stay with pure functions, and could use some guidance. Pardon
me if some of my terms
For a single value
there seems to be little reason to adopt refs, though I've often
wondered why Stuart Halloway's book gives an example updating a single
ref of messages for a chat application.
I seem to recall atoms being the last reference type to be introduced.
They might not have existed
- value of x supplied at the from of the given arguments. The forms
+ value of x supplied at the front of the given arguments. The forms
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Looks like I'll be doing a talk on clojure next week at the local java
user group.
Any recommendations on slides I can steal? :)
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Hi,
On Thu, Mar 4, 2010 at 11:58, Wilson MacGyver wmacgy...@gmail.com wrote:
Looks like I'll be doing a talk on clojure next week at the local java
user group.
Any recommendations on slides I can steal? :)
There are some presentations in our google group file section[1]. Look
for PDF files.
On Mar 2, 11:34 pm, Sophie itsme...@hotmail.com wrote:
How do I choose? What are the trade-offs?
Any and all guidance, insights, advice etc. welcome!
Thanks!
To me, it seems like you have two orthogonal pieces of data, and a
function that builds a report from that data. You have a set of
In trying to build compojure with the git MASTER versions of clojure
contrib I ran into this error:
Clojure 1.2.0-master-SNAPSHOT
user= (use 'clojure.contrib.string)
java.lang.IllegalStateException: repeat already refers to:
#'clojure.core/repeat in namespace: user (NO_SOURCE_FILE:0)
So I
Hi,
On Mar 4, 7:36 am, cageface milese...@gmail.com wrote:
So I figured I'd try to use the :exclude option but got this:
user= (use 'clojure.contrib.string :exclude [repeat])
java.lang.IllegalArgumentException: Don't know how to create ISeq
from: java.lang.Boolean (NO_SOURCE_FILE:0)
Almost
Hi :
I would try to make a macro to simplify the database methods as
follows, but it doesn't work,
is there any way to fix it, or any easier solution? Thanks..
(defmacro with-db [ body]
`(with-connection *db* ~...@body))
(defmacro with-transaction [ body]
`(with-db (transaction
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