IN PRESS

Grammar for pandas: Our J-ottings columnist Norman Thomson mixes it with pandas, shoots and leaves
Financial math in q: Jan Karman starts a series of articles on basic financial math in q with Graduation of mortality
Combine far faster: R.E. Boss harvests new insights generating combinations faster in J
Rediscovering APL’s history: Catherine Lathwell meets the Californian veterans
J and q for Lispers: Slobodan Blazeski explains why Lisp programmers study array languages
R… statistics!: Simon Marsden reaches for the rich resources of the R language – not a big stretch with his APLX-R interface
APL The Next Generation: Stardate 2009. Ajay Askoolum finds Visual APL ready for the Visual Studio universe of polyglot solutions. Boldly go.
Full moons and Sundays: Calculating when Easter falls ought to be tricky. Ray Polivka finds an old solution that needs just ten divisions
Below the SALT: Dyalog’s SALT lets you define functions, variables, namespaces and classes from scripts – but how to turn the workspaces you have into scripts? Dan Baronet shows it’s a snap
Beyond average: The Dfn expression of the classic APL average function {(+/⍵)÷⍴⍵} is widely thought to be unimprovable. Roger Hui shows otherwise
Cocking & Darwin: Darwin
Get evolution working for you. Romilly Cocking shows you how to grow your own programs using genetic algorithms
The problem with the world: Writing DotNet assemblies means handling multiple metrics. Get yourself ready with our GPS reader challenge
Backgammon tools in J: Part 1: Howard Peelle takes us through expected bear-off rolls
Inner product – an old/new problem: Roger Hui uses an old algorithm to hurry up Dyalog’s inner products
DNA, APL – and who you are: Charles Brenner discovers some home truths
Functional calculation in J: Part 3: Neville Holmes introduces us to the structural ingredients
All but one: J-ottings columnist Norman Thomson explores omission and reduction
FinnAPL in Tallinn: News and recent developments from those smart people on the Baltic Rim. Adrian Smith reports.
A newbie’s discovery of APL: “Have you ever seen anything so elegant?” Rebecca Burriesci reviews A Practical Introduction to APL.

Help wanted Join the Vector Working Group and contribute or learn some useful skills. More…

Vol.24 N°1

Current issue

Volume 24 N°1, Dec 2008

Curve it like Cauchy: Jones & Reiter use some simple J to draw out Cauchy’s Integral Theorem – and discover startling and lovely shapes.
Suffer the little children…: to bring their homework to Norman Thomson
Dyalog 2008: Adrian Smith reports from Dyalog’s largest-ever user meeting.
Industry news: APL2000 in D.C. plus news from Dyalog, Kx Systems and MicroAPL
Unicode – playing to win: Morten Kromberg meets some strange characters on the Basic Multilingual Plane. (Watch the chessboard demonstration on YouTube.)
Tales from the crypt: APL Germany is more alive than you thought.

So is APL2: Liebtag on Structured Storage and Monitor Expressions
Quickly correlating Kendall: Phew! Gordon Sutcliffe shares a fast way to calculate Kendall’s rank correlation frequency distribution.
About polynomials: The second part of Gianluigi Quario’s article on representing and evaluating polynomials.
Spice for beginners: Dan Baronet on how to use the new programmable command line in Dyalog’s IDE.

Pictures from Dyalog 09

JOBWATCH

Last Updated: March 10 2010 .

Developing Software as a Service (SaaS) – Contract – in Dyalog and ASP.NET (details…)

APL programmer Brussels, Belgium – Permanent/Contract – financial services (details…)

more jobs…

News feed

Vector Books have published the second edition of At Play With J, bringing it up to date with the latest version of the language

Roger Hui has posted the complete text of Iverson’s A Programming Language (1962) on the J Wiki

APL2000 Inc. has announced its 2010 User Conference.

Berlin Technische Universität

APL2010 has called for papers.

IBM released Workstation APL2 Version 2 Service Level 15

Dyalog 12.1 released Version 12.1

MicroAPL released APLX Version 5

Donald B. McIntyre 1923-2009

FinnAPL will hold its annual Forest Seminar on 15-16 April 2010

Games of life and death 62nd APL Analysts GOSPER Glider Gun Combat Support? This strange patch turned up on Flickr.

Kx Systems has released version 2.6 of kdb+ with nanosecond timestamps as a datatype. Press release…

50 in 50 Guy Steele and Richard Gabriel presented fifty 50-word remarks on 50 programming languages in 50 minutes at JAOO Århus 2008. APL too, of course.

Dave Objects
The Dyalog 09 conference in Princeton heard keynote speaker Dave ‘Objects’ Thomas, pioneer of object-oriented programming, and architect of the Eclipse IDE. He objects to much in current software development practice and these days recommends vector languages and close collaboration with end users. Word is getting around.

Tom’s Turnabout
In a short article in the July/August issue of IEEE Software, industry luminary Tom DeMarco renounced his seminal 1980s work on software-engineering metrics. Software development is and always will be somewhat experimental. Word is getting around.

Congratulations to the winners of the $11,000 2009 Worldwide Programming Contest. First prize, which included entry and travel to Dyalog ’09, went to Ronald Chan. (more…)

Gil Athoraya
The Vector Working Group welcomes new contributing editors Beau Webber, Catherine Lathwell,Gilgamesh Athoraya and editorial intern Laura Linton, all at work now on the next issue.