I agree there are some J solutions on RC that could be viewed as (or are)
rather incomprehensible. I'm not sure there is a single consensus of what
makes a great RC contribution though. Some argue that it should be the most
natural solution for the language, others the most concise or the fastest.
Try to solve the following problems in your favorite non-J language, then
doing the same in J. Problems are posed for APL but work just as well for
J.
http://www.jsoftware.com/papers/APL_exercises/
2.5 Cantor Set
Write a function to compute the Cantor set of order n, n>:0.
Cantor 0
1
Cant
Yes, after reading my own description of my fascination with tacit I thought I
sounded like a prick, so I'm trying to use explicit more, and it is nice: still
concise, but easier to parse.
One thing that irks me is the J solutions posted on Rosetta Code. Here's the
one for Pythagorean triples.
On 11/28/2017 06:46 PM, Henry Rich wrote:
> I guess we can disagree on whether the bogging down is to be
> attributed to J or to the user.
I wouldn't necessarily disagree with you too much about that. :) I
realize I'm a clueless newb; but it does seem that J presents greater
syntactic difficul
Parsing midi files is something I've done a little of. Why did you
consider J unsuited for that? Is it not great at string manipulation?
It seems inconvenient to have all strings in an array forced to be of
the same length.
On 11/28/2017 04:56 PM, Henry Rich wrote:
> There's nothing specifi
Well I teach some mid-level math courses that can benefit from simple
computer demos: fractals, math modeling (e.g. Markov Chains, queuing,
Spirograph(!)).
I also need to write occasional scripts to help with scantron exams for
the dept.
Personally I'm interested in computer assisted music.
Did Scott ever write that blog post he mentioned in the linked post? I am
quite interested in reading more about his testing.
On Wed, Nov 29, 2017 at 11:28 AM, chris burke wrote:
> See also Scott's post on Jd vs Spark at
> http://www.jsoftware.com/pipermail/database/2015-May/76.html
>
> On W
A new Jd update is available. It is still called version 4.6, but includes
sort.
The Jd sort op sorts table cols in place based on 1 or more data cols.
This is important for some applications and also sets the stage for future
interesting developments.
The Jd sort implementation is a nice exampl
See also Scott's post on Jd vs Spark at
http://www.jsoftware.com/pipermail/database/2015-May/76.html
On Wed, Nov 29, 2017 at 7:19 AM, Eric Iverson
wrote:
> Jd is the Jsoftware database product. It replaced JDB several years ago.
> JDB was a proof- of-concept that led to Jd as a commercial pr
Jd is the Jsoftware database product. It replaced JDB several years ago.
JDB was a proof- of-concept that led to Jd as a commercial product.
See http://code.jsoftware.com/wiki/Jd/Index for Jd documentation.
On Wed, Nov 29, 2017 at 2:24 AM, 'Skip Cave' via Programming <
programm...@jsoftware.com>
Hi all!
It is the best executable high level notation I found. I use it to
create algorithms I use in other languages.
It also gives me a good supply of problems to solve. Since it is such a
hopeless notation, using it is very difficult, which means using it is
good mental training. Like sud
It's unusual to create a whole program and run it. It's not at all
unusual to create a sentence and run it (using ". y). In an interpreted
language the distinction between 'code' and 'data' doesn't have to be sharp.
Henry Rich
On 11/28/2017 9:31 PM, Daniel Lyons wrote:
On Nov 28, 2017, at
On Tue, Nov 28, 2017 at 9:31 PM, Daniel Lyons wrote:
> That's kind of a cool idea. Is it commonly done, generating a block of code
> in a string and evaluating it?
That's the basic concept behind compilers, though the way you've
phrased it here is slightly different.
That said, note that you ca
In 1980 I made a program for passing the diagram of activities for a large
project, computing duration and cost of the project, based on durations and
costs of the activities.
In PERT you have a record per node and a record per edge in the graph. I didn't
do it that way. I still had a record pe
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