Eclipse Junio GUI (Theme)

1.
To change to older theme:

General --> Appearance --> Theme: Classic.

2.
Also, I found in this blog that it can be changed at lower level:


plugins\org.eclipse.platform_4.2.0.v201206081400\css

to something like,
plugins\org.eclipse.platform_4.2.0.v201206081400\css.old

Eclipse & Proxy Config

Necessary config when being behind a Firewall/Proxy:

use MANUAL Active-provider under General->Network Connections.

Clean the SOCKS option and only set HTTP & HTTPS with proxy values.

Dudeney's Star Puzzle

Tomado textual de mathpuzzle.com Alex Ravsky encontro una solucion mejor para un puzzle de Dudeney.

Similar como el caso de Klondike de Sam Loyd en los 70s.


The task of the star puzzle, ((X36 = AM329) according to the list [Knu] by Donald E.
Knuth) published a century ago in The Strand Magazine [Dud2], is to construct a path,
consisting of 14 straight strokes, on the following field of stars from one light star to the
other such that all the stars lay on the path.

Paper original puede ser obtenido en http://arxiv.org/abs/1205.0747

Four on a Match

Kadon has many fun puzzles and some contests.

by solving one of them, I received Four on a Match two years ago:

I think it was good time to publish it :P

Combinatorial Explosion

I think the discussion should have more emphasis in the best practice of using this kind of tool; Just like it is mentioned and used in the MatrixGame & TheLuckyString problems, we need to generate certain rules/filters to optimize the search. To look for all n! possibilities probably never will be a feasible solution. This is also called Combinatorial Explosion which verbatim refers to a growth almost impossible to sustain for the time of this type of TC problems.

So more important than the implementation ( which is assumed know -next_permutation()- that this is called Algorithm L in Knuth's TAOCP 4: 7.2.1.2) it is the good use some criteria for pruning combinations (permutations) and at the end we obtain a reasonable running time.

Many problems use this kind of booby-trap to let the programmer to try to solve with a plenty quick solution which runs over all permutations (or combinations) that finish with a timeout or an unnecessary overhead as resources used (such us memory).

The 25 Holes Challenge

Uno de los contests aun abiertos en Kadon es el basado en su juego Vee-21.

Mi solucion es:

Kadon Contests

Ademas de tener varios productos de muy buena calidad e ingenio ;)
Kadon tiene unos pequennos concursos, interesantes como desafio mental, a ver si se animan:

http://www.gamepuzzles.com/contests.htm

Oracle Certified Expert, Java EE 6 Web Component Developer

Despues de pasar el ex-SCWCD y ahora OCPWCD es el momento de ver lo nuevo de EE 6 y sobre todo acerca de Servlet 3.0: OCEJWCD

Lo interesante de este examen es que requiere un porcentaje mas bajo para poder pasarlo: 64%

http://education.oracle.com/pls/web_prod-plq-dad/db_pages.getpage?page_id=458&get_params=p_track_id:JEE6WCD

WLS 12c: Distinctive Recipes: Repository of Solutions

A wonderful book with a collection of straightforward information and solutions. Interesting recipes, direct to provide clear solutions and examples.

It explains several topics -traversal to middleware tier including last Cloud technology- that are not 100% covered in the official Oracle documentation.

It gives suggestions of different tools to work with WLS 12c one popular, but another hidden open source gems, such us, NeatBeans, j4psh, Grinder, BadBoy, JMeter, Jolokia, among others.

Supported by webcasts and useful samples for EJB Timer, JSP stress test case, Web Services, that can be downloaded from author's site.

At the end, a great easy to use all-in-one cookbook to save hours of researching in different resources.

Grandes Números

A medida que la civilizacion avanza se usa numeros mayores, por diferentes motivos.
Uno de ellos es lamentablemente la inflación de ciertos paises por

Un caso historico es Alemania justo antes de la Segunda Guerra Mundial y hoy en dia es Zimbawe:

https://en.wikipedia.org/wiki/File:Zimbabwe_Hyperinflation_2008_notes.jpg

http://gamasutra.com/view/feature/183525/the_burning_of_star_wars_the_old_.php