"Blooper" Contest

A old contest I solved on 2009 from Kadon !

The prize:

N Is a Number: A Portrait of Paul Erdös (1993)

de George Paul Csicsery

Documental que habla de la vida del prolífico matemático Paul Erdös, su simpática excentricidad, reuniones con otros matemáticos alrededor del mundo en un época en la cual viajar tanto no era común.

Un húngaro judio sobreviviente de la segunda guerra donde la política también le importaba, pero como siempre la veia de una forma lúdica. Son varios cortos de conversaciones con él, sus anécdotas y la explicación de el coloquial Número de Erdös, con muy simples tomas de nivel amauter que sin duda lo hicieron otros colegas de él.

Del punto vista cineasta no atrae demasiado, pero si conocer de la vida de una de las grandes mentes matemáticas que ayudó a escribir más de 1500 papers y no es masivamente conocido.

Distinctive Recipes, 2nd Ed.: 12.1.2 + 12.1.1 (and 10.3.x)

This is the Second Edition of Oracle WebLogic Server 12c: Distinctive Recipes: Architecture, Development and Administration, where new recipes are added and several have changed a lot, including differences from 12.1.1 (and 11g) to the new architectural design of 12.1.2 (and beyond based on the road-map).

After Oracle acquisition, WLS always was considered the main tool for Middleware, and several changes were planned for it, now it is the time and this book provides detailed recipes to take advantage of them and resolves issues in a practical and quick way.

Important new chapters from new features were added, related to Node Managers, JMS and Distributed Destinations, Cluster Targeted JMS, Server Templates, among others.

It is a new upgrade for WLS 12.1.2, including tips & tricks to get the best of this world class application container.

Kadon Prize

I got another nice prize from Kadon Games !!!

The place where you can find incredible fun challenging puzzle games.

Regular Expressions Cookbook: Errata

Nuevo errata encontrado, ahora es uno matemático de una fórmula mal escrita... me imagino que el autor sabia que poner, pero se tuvo que traspapelar la fórmula.

http://www.oreilly.com/catalog/errataunconfirmed.csp?isbn=0636920023630

Footnote 2:

If there are n characters between the double quote and the end of the string, the regex engine will try 2 1/n permutations of ‹ (?:[^"\r\n]+|"")* ›

----

it appears: 2^(1/n)
(this trends to 1, when n grows)

however, it must say 2^(n-1)
when n=4 the number of permutations is 8.
(thus, it has an exponential behaviour).

The method assumeFalse(String, boolean) is undefined for the type Assume

When trying to compile ant project I got the next error message:

The method assumeFalse(String, boolean) is undefined for the type Assume

Well, this is because I was using junit 4.8.2 and that method's signature is available in 4.11
(maybe an earlier version).

Anyway, the good practice is to download the libraries with fetch.xml.

Regular Expressions Cookbook, 2nd Edition by By Jan Goyvaerts, Steven Levithan

Regular Expressions Cookbook, 2nd Edition
Detailed Solutions in Eight Programming Languages
By Jan Goyvaerts, Steven Levithan
http://shop.oreilly.com/product/0636920023630.do
 

It starts with a good analysis of online and offline regexp tools. Most known applications that can be found in the net, but doing a emphasis to his proprietary tool regexbuddy.

As a classical O’reilly cookbook splits knowledge in contextual sections. Question & Answer, without hesitation, several solution sometimes quick and dirty, but afterward a complete background and more elegant explanation of the consequences of using such approach, providing a better (maybe the best) solution.

The focus of this book is to provide several recipes, direct solution and not an introductory lexical compiler learning book. It gives solutions with many constraint for different flavors of regexp engines, such us, .NET, Java, JavaScript, PCRE, Perl, Python, Ruby.

This cookbook provides a basic introductory chapter, then later chapters becomes more explicit for common programmatic expressions (very wide scope), that most coders would need sometime in their projects, for instance, URLs, Comments, Numbers, Dates (arghhh), XML, CSV, among others.

Knuth Checks Again ?

It seems that Prof. Knuth is sending again reward checks for typo/errors/solutions for his books.

Surprisingly, I have received one on December 2013.
 
* This time was a simple Spanish acute accent

Pi within Pi

The string 31415926 occurs at position 50,366,472. This string occurs 3 times in the first 200M digits of Pi.
counting from the first digit after the decimal point. The 3. is not counted.

This reports is obtained from http://www.angio.net/pi/ , in interesting page where you can search Strings inside of Pi.

Java Network Programming by Elliotte Rusty Harold; O'Reilly Media

Java Network Programming, 4th Edition
Developing Networked Applications
By Elliotte Rusty Harold
http://shop.oreilly.com/product/0636920028420.do

Wisely divided in 13 main parts, reviewing transversely all the network API (and more).
Starting from basic network concepts, including information about NIO, Asynchronous Channels, Socket Options (Java 7), until IP Multicasting. Author mentions that Java Network API is stable since version 1.0 and we shouldn't have any issue after Java 8 is released, anyway as we know, always these future assumptions must be taken carefully about any migration.

Being the 4th edition, it is certainly a proved book, with mature information about the network scope.

Very detailed information on its coding examples, regarding the interfaces, constructors, direct/undirected classes, event handlers, exception handling, and their respective methods.
At the end, explain how this complex API can be used in the expected/correct fashion.

Similar to the new (2nd) edition of Java Web Services book, there is an emphasis on the current de-facto REST standard.

Kind of bible, reference and cookbook of network Java, responding all the most common doubts (and some very peculiar).
for the beginner and advanced developer, well redacted.

Although there are a lot of snippet code in the book, the complete examples can be downloaded from author's website.