The Architecture of Open Source Applications Architects look at thousands of buildings during their training, and study critiques of those buildings written by masters. In contrast, most software developers only ever get to know a handful of large programs well—usually programs they wrote themselves—and never study the great programs of history. As a result, they repeat one another's mistakes rather than building on one another's successes. Our goal is to change that. If you are a junior developer, and want to learn how your more experienced colleagues think, these books are the place to start. Teaching Open Source Let Over Lambda Hibernate Annotations First, set up your classpath (after you have created a new project in your favorite IDE): Alternatively, import your pom.xml in your favorite IDE and let the dependencies be resolved automatically, We recommend you use Hibernate Validator and the Bean Validation specification capabilities as its integration with Java Persistence 2 has been standardized. Download Hibernate Validator 4 or above from the Hibernate website and add hibernate-validator.jar and validation-api.jar in your classpath. Alternatively add the following dependency in your pom.xml. <project> ... If you wish to use Hibernate Search, download it from the Hibernate website and add hibernate-search.jar and its dependencies in your classpath. <project> ... We recommend you use the JPA 2 APIs to bootstrap Hibernate (see the Hibernate EntityManager documentation for more information). If you boot Hibernate yourself, make sure to use the AnnotationConfiguration class instead of the Configuration class. Note
Simon Peyton Jones: book Simon Peyton Jones and David Lester. Published by Prentice Hall, 1992. Now, alas, out of print. However the full text of the book is available here: Abstract This book gives a practical approach to understanding implementations of non-strict functional languages using lazy graph reduction. The unusual aspect of the book is that it is meant to be executed as well as read. Overview of the book The principal content of the book is a series of implementations of a small functional language called the Core language. Appendix B contains a selection of Core-language programs for use as test programs thoughout the book. The main body of the book consists of four distinct implementations of the Core language. Chapter 2 describes the most direct implementation, based on template instantiation. The machine interpreter simulates the execution of the compiled program. One important way in which the Core language is restrictive is in its lack of local function definitions. Typographical errors
Hibernate Annotations First, set up your classpath (after you have created a new project in your favorite IDE): Alternatively, import your pom.xml in your favorite IDE and let the dependencies be resolved automatically, We recommend you use Hibernate Validator and the Bean Validation specification capabilities as its integration with Java Persistence 2 has been standardized. Download Hibernate Validator 4 or above from the Hibernate website and add hibernate-validator.jar and validation-api.jar in your classpath. Alternatively add the following dependency in your pom.xml. <project> ... If you wish to use Hibernate Search, download it from the Hibernate website and add hibernate-search.jar and its dependencies in your classpath. <project> ... We recommend you use the JPA 2 APIs to bootstrap Hibernate (see the Hibernate EntityManager documentation for more information). If you boot Hibernate yourself, make sure to use the AnnotationConfiguration class instead of the Configuration class. Note
Common Lisp: A Gentle Introduction to Symbolic Computation This book, with minor revisions, is back in print from Dover Publications and can be purchased in paperback form at Amazon.com, Barnes & Noble, etc. An e-book version will be released in late February, 2013. Free software accompanying the book is also available. This 1990 edition may be distributed in hardcopy form, for non-profit educational purposes, provided that no fee is charged to the recipient beyond photocopying costs. Entire book -- Postscript (1.75 MB file) Entire book -- PDF (1 MB file) Figures missing from the book (780K PDF) Free software accompanying this book is also available. Materials provided by David S.
Develop your own epub editor The previous posts in this series explored the structure of epub books and demonstrated how the epub standards work together to describe and package content documents. If you found those articles highly technical you might want to look away now - this post is the first of a series that shows how to create your own web-based, wysisyg editor that you can use to create epub documents. The programming strand of Inside Epub starts here. This post is an introduction to the subject and gives an idea of the development environment, the software tools, and the documentation that will be available as the project unfolds. There are still topics to cover in the previous strand, like embedding XML islands in your content and handling fallback from non-standard to standard document types - and I will cover those in future. Objectives - mine and yours The aim of the programming strand of this blog is to create a web-based, wysiwyg epub editor. Figure 1. Figure 2. epub data model Figure 2. epub class
Top 50 Free Open Source Classes on Computer Sci... Computer science is an interesting field to go into. There are a number of opportunities in computer science that you can take advantage of. With computers increasingly becoming a regular part of life, those who can work with computers have good opportunities. You can find a good salary with a program in computer science, and as long as you are careful to keep up your skills. Here are 50 free opencourseware classes that can help you learn more about computer science: Introduction to Computer Science Learn the basics of computer science, and get a foundation in how computer science works. Introduction to Computer Science: Learn about the history of computing, as well as the development of computer languages. Comprehensive Computer Science Collections If you are interested in courses that are a little more comprehensive in nature, you can get a good feel for computer science from the following collections: Programming and Languages Computer Software Computer Systems and Information Technology
PatternLayout (Apache Log4j 1.2.17 API) java.lang.Object org.apache.log4j.Layout org.apache.log4j.PatternLayout All Implemented Interfaces: OptionHandler public class PatternLayoutextends Layout A flexible layout configurable with pattern string. The goal of this class is to format a LoggingEvent and return the results as a String. The conversion pattern is closely related to the conversion pattern of the printf function in C. You are free to insert any literal text within the conversion pattern. Each conversion specifier starts with a percent sign (%) and is followed by optional format modifiers and a conversion character. Let the conversion pattern be "%-5p [%t]: %m%n" and assume that the log4j environment was set to use a PatternLayout. Category root = Category.getRoot(); root.debug("Message 1"); root.warn("Message 2"); would yield the output DEBUG [main]: Message 1 WARN [main]: Message 2 Note that there is no explicit separator between text and conversion specifiers. By default the relevant information is output as is. Since:
OpenAi - - about us The OpenAI site is centered around an Open Source project and community involving artificial intelligence. The term "Open Source" means that the source code for the project is available for free and can be used by others free of charge. Artificial Intelligence refers to the general aim of intelligent computing, making machines think and learn. The project itself is the creation of a set of tools that are considered to be models of human intelligence. We're looking for this site to be: a home for the OpenAI project a place for the community to connect an information repository for AI in general a showcase for the tools The project itself is geared toward developing a specification for AI related tools. OpenAI will also provide the details of the specification online as it develops so that the community can help in it's creation by giving insight and criticism. Technologies like XML and CORBA will be used for configuration, persistence and communication.
About Java.net Java.net is a large community of Java developers and their projects. We welcome anyone interested in Java, related JVM technologies, and education to our discussions and projects. Communities and Projects We manage our projects in a different way from most forges in that we try to maintain curated communities of projects - that is projects that use similar technologies or of similar types are grouped together in an area to make it easier to find other developers with similar interests and skills and their projects. You can find descriptions of our communities here and a description of our project workflow here. Editorial Content, Blogs, Forums We're committed to bringing you the latest and broadest coverage of Java topics on our home page - from technical articles, to news on events, to blogs. Future Enhancements We are committed to making the site the best it can possibly be. Creating a Project Got Questions? 255527 reads
Cellular Automata Method for Generating Random ... It is an old and fairly well documented trick to use cellular automata to generate cave-like structures. The basic idea is to fill the first map randomly, then repeatedly create new maps using the 4-5 rule: a tile becomes a wall if it was a wall and 4 or more of its nine neighbors were walls, or if it was not a wall and 5 or more neighbors were. Put more succinctly, a tile is a wall if the 3x3 region centered on it contained at least 5 walls. Each iteration makes each tile more like its neighbors, and the amount of overall "noise" is gradually reduced: If 45% of the original random map contains walls and the process is repeated 5 times, the output might look like the following: The problem is that the results are inconsistent. It also sometimes generates maps which consist of one huge open space: We can fix the disjoint segments problem in one of three ways. The solution to both problems, as it turns out, is to revisit the original cellular automata rules. Or, in more compact notation: W?
Spring Annotations Tutorial In the previous tutorials, we learned how we can inject the dependencies from xml files. Spring also provides a mechanism where it can automatically handle the injection of properties and referred objects without defining them in xml files. This is accomplished by using Spring Annotations. Some of the important annotations that can come handy while working are: @Autowired @Resource @PostConstruct @PreDestroy @Qualifier @Required @Bean @Component @Service @Repository Let us take an example of a class "Bar", which requires a reference of "Foo" class. Bar.java package annotation;public class Bar { private Foo foo; private Foo foo2; public void setFoo(Foo foo) { this.foo = foo; } public void printFooName(){ System.out.println(foo.getName()); System.out.println(foo2.getName()); }} Foo.java package annotation;public class Foo {private String name;public void setName(String name) { this.name = name;}public String getName() { return name;}} Download Source