Article Network

Good time management in CasperJS tests

by Éric Bréhault | January 2014 | Open Source Web Development

In this article by Éric Bréhault, the author of Instant Testing with CasperJS, we will learn how to test our use case with CasperJS and how timing is everything.

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Going Viral

by Nathan Danneman Richard Heimann | March 2014 | Open Source

In this article by Nathan Danneman and Richard Heimann, the authors of Social Media Mining with R, introduces readers to the concept of social media mining. This article discusses sentiment analysis, the nature of contemporary online communication, and the facets of Big Data that allow social media mining to be such a powerful tool.

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Going Isometric

by Juwal Bose | December 2013 | Games Open Source

This article by Juwal Bose, author of the book Starling Game Development Essentials, helps you to understand the isometric projection and details the relationship between the Cartesian and isometric coordinates.

The topics covered in this article are as follows:

  • Cartesian to isometric equations
  • An isometric view via a matrix transformation
  • Implementing the isometric view via isometric art
  • Level data structure
  • Altering registration points
  • Depth sorting
  • Understanding isometric movement
  • Detecting isometric collision
Read Going Isometric in full

Going Beyond the Basics

by John Ewart | May 2014 | Networking & Telephony Open Source

In this article by John Ewart, author of Managing Windows Servers with Chef, we learn various aspects about Chef's language and also learn to handle multiple platforms.

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GoboLinux: An Interview with Lucas Villa Real

by Mayank Sharma | October 2007 | Architecture & Analysis Linux Servers Networking & Telephony Open Source

For GoboLinux, rules are meant to be broken!

There are all sorts of Linux distributions. Yet developers will always find a new reason to work on another one. As a wide-eyed free and open source software buff turned journalist, I've run into distros in many shapes and sizes that run on almost every piece of hardware I own, from a laptop to a gaming device, to a cell phone. GoboLinux is one distro that's fun enough to run once, educational enough to run twice, and useful enough to run as a regular easy to use desktop.

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GnuCash: Payroll Management, Depreciation, and Owner's Drawing

by Ashok Ramachandran | March 2011 | Open Source

GnuCash is a personal and small business bookkeeping and accounting software. Designed to be easy to use, yet powerful and flexible, GnuCash allows you to track bank accounts, income, and expenses. As quick and intuitive to use as a checkbook register, it is based on professional accounting principles to ensure balanced books and accurate reports.

In the previous article by Ashok Ramachandran, author of the book Gnucash 2.4 Small Business Accounting: Beginner's Guide, we took a look at why budgets are needed, how to create them, and how to create reports showing budget vs. actual comparison.

In this article we shall cover the following:

  • Employees and payroll: GnuCash doesn't have a payroll module. However, we will show how to enter payroll data for employees. We will also cover employee expense voucher processing.
  • Depreciation: We will recommend ways of setting up accounts for depreciation and making entries.
  • Paying yourself (also known as owner's draw): We will walk through the steps involved in cash withdrawals by the owner.
Read GnuCash: Payroll Management, Depreciation, and Owner's Drawing in full

GNU Octave: Data Analysis Examples

by Jesper Schmidt Hansen | June 2011 | Beginner's Guides Open Source

Octave is an ideal tool to perform many different types of data analysis. The data can be generated by other programs or be collected from a database and then loaded into Octave's workspace. The data analysis tools in Octave are based on a truly impressive arsenal of different functions. In this article by Jesper Schmidt Hansen, author of GNU Octave Beginner's Guide, we will only discuss a few of them here, namely, how to perform the simplest statistical analysis and function fitting.

In brief terms, upon reading this article, you will learn:

  • More about the ASCII file formats that can be loaded into Octave's workspace.
  • How you can use Octave to perform simple descriptive statistics.
  • About fitting different functions to data.
Read GNU Octave: Data Analysis Examples in full

GLSL – How to Set up the Shaders from the Host Application Side

by Jacobo Rodríguez | December 2013 | Open Source

In this article written by Jacobo Rodríguez, the author of the book GLSL Essentials, we will learn how to set up the shaders from the host application side.

OpenGL 4.3 is a C language API that bases its design in encapsulating objects in opaque handles that represents abstract concepts (from the user's point of view) such as textures, shaders, vertex buffers, and so on. In order to render something using OpenGL, we have to create those objects, associate our data to them, and issue the required OpenGL commands to set them as active, and in the last term, launch the draw call.

Let's define an important computer graphics concept: a rendering batch. A rendering batch is the geometry set that will be rendered along with the textures, OpenGL's states and shaders. Once we have all that data ready, we can issue the drawing command to the GPU, and hopefully (if we did everything correctly) watch the rendering in our screen.

The order of the creation of the different OpenGL objects is not relevant. You can first create the vertex buffer or the shaders, or first the textures and then the shaders. I will use the following order just for teaching purposes:

  1. Vertex array objects
  2. Textures
  3. Shaders

Then, I will put all together and render the batch.

Read GLSL – How to Set up the Shaders from the Host Application Side in full

GLSL 4.0: Using Subroutines to Select Shader Functionality

by David Wolff | August 2011 | Cookbooks Open Source Web Graphics & Video

In GLSL, a subroutine is a mechanism for binding a function call to one of a set of possible function definitions based on the value of a variable. Subroutines therefore provide a way to select alternate implementations at runtime without swapping shader programs and/or recompiling, or using if statements along with a uniform variable.

In this article by David Wolff, author of OpenGL 4.0 Shading Language Cookbook, we'll demonstrate the use of subroutines by rendering a teapot twice. The first teapot will be rendered with the full ADS shading model described earlier. The second teapot will be rendered with diffuse shading only. A subroutine uniform will be used to choose between the two shading techniques.

Read GLSL 4.0: Using Subroutines to Select Shader Functionality in full

GLSL 4.0: Discarding Fragments to Create a Perforated Look

by David Wolff | August 2011 | Cookbooks Open Source Web Graphics & Video

Fragment shaders can make use of the discard keyword to "throw away" fragments. Use of this keyword causes the fragment shader to stop execution, without writing anything (including depth) to the output buffer. This provides a way to create holes in polygons without using blending. In fact, since fragments are completely discarded, there is no dependence on the order in which objects are drawn, saving us the trouble of doing any depth sorting that might have been necessary if blending was used. In this recipe by David Wolff, author of OpenGL 4.0 Shading Language Cookbook, we'll draw a teapot, and use the discard keyword to remove fragments selectively based on texture coordinates.

Read GLSL 4.0: Discarding Fragments to Create a Perforated Look in full

Glossary in UPK 3.5

by Dirk Manuel | October 2009 | Oracle

This article by Dirk Manuel explains how to build and implement a Glossary.

A Glossary defines terms that are unique to a project or system, or new to your users. A Glossary typically consists of a number of term/description pairs. The added value that UPK provides is that instances of each term in exercises can be hyperlinked to the relevant entries in the Glossary.

Read Glossary in UPK 3.5 in full

Getting Your Hands Dirty with jPDL: Part 1

by Mauricio Salatino | December 2009 | JBoss MySQL Java PHP

In this article by Mauricio Salatino, we will cover the main points that you need in order to start working with the jBPM framework.

This article will tackle, in a tutorial fashion, the first steps that you need to know in order to start using the framework with the right foot. We will follow a real example and transform the real situation into requirements for a real jBPM implementation.

Read Getting Your Hands Dirty with jPDL: Part 1 in full

Getting Your Course Ready for a New Semester

by Brandon Ballentine | January 2013 | Cookbooks e-Learning

In this article by Brandon Ballentine, author of Desire2Learn for Higher Education Cookbook, we will cover the following recipes:

  • Copying course materials from a previous semester

  • Importing a publisher's course cartridge

  • Changing many due dates from one screen

  • Double-checking everything from the student view

  • Configuring your web browser

Read Getting Your Course Ready for a New Semester in full

Getting Your APEX Components Logic Right

by Douwe Pieter van den Bos | July 2009 | Oracle

In this article by Douwe Pieter Van Den Bos, we will get ready for our Forms conversion and generation. In this part of our conversion project, we will investigate, analyze, and adjust some of the most important parts of our application. This means that we will set everything up for the generation of the application. We will discuss the following parts of the conversion project in this article:

  • Investigating the components that will be generated
  • Getting to know the database blocks in our Forms files
  • Looking deeper into the block items inside our blocks and editing them
  • Enhancing the queries on which our blocks are based
  • Analyzing the triggers we have in the Forms XML files
  • Massively changing the completeness and applicability of triggers or items
  • Customizing the query that the blocks are based on in order to complete our generation
  • Understanding the way our pages will be generated in APEX
  • Editing the titles of our blocks and items
  • Analyzing our business logic (probably the most important part)
Read Getting Your APEX Components Logic Right in full

Getting Up and Running with MySQL for Python

by Albert Lukaszewski, PhD | December 2010 | MySQL Open Source

There are, several ways to get MySQL for Python in a place such that your local Python installation can use it. Which one you use will depend as much on your familiarity with your operating system and with Python itself, as it will on which operating system and version of Python you are running.

In this article, by Albert Lukaszewski, PhD, author of MySQL for Python, we will cover the following:

  • Where you can get MySQL for Python
  • Installing MySQL for Python
  • Importing the module into your programs
  • Accessing online help about the MySQL for Python API and its accompanying modules
  • How to connect to a database
  • How to create a MySQL cursor proxy within your Python program
  • How to close the database connection from Python
  • How to access multiple databases within one program
Read Getting Up and Running with MySQL for Python in full

Getting to know NetBeans

by Atul Palandurkar | September 2013 | Open Source

NetBeans IDE is an award-winning integrated development environment (IDE) available for Windows, Mac, Linux, and Solaris. The NetBeans project consists of an open-source IDE and an application platform that enable developers to rapidly create web, enterprise, desktop, and mobile applications using the Java platform, as well as JavaFX, PHP, JavaScript and Ajax, Ruby and Ruby on Rails, Groovy and Grails, and C/C++. Even we can download, distribute the NetBeans IDE for free of cost. There are many people who use NetBeans but they don’t know about the NetBeans Platform. NetBeans Platform is the best ever framework for the Swing Desktop applications which provides many new tools & readymade widgets for the development of Rich Client applications.

A free and open-source Integrated Development Environment (IDE) for software developers. In this article by Atul Palandurkar, author of Instant NetBeans IDE How-to, you get all the tools you need to create professional applications with the Java platform such as follows :

  • Desktop applications,
  • Enterprise applications,
  • Web applications, and
  • Mobile applications,
Read Getting to know NetBeans in full

Getting to Grips with the Facebook Platform

by Dr Mark Alexander Bain | May 2008 | MySQL Open Source PHP

In this article by Dr. Mark Alexander Bain, we will be dealing with building a Facebook application. However, before we jump into building a Facebook application, we need to spend some time looking at the Facebook platform, and by the end of this article you will:

  • Understand what the Facebook Platform is, and how it relates to your application
  • Know about the elements that make up the Facebook Platform, and how to test them without having to create an application
  • Know how to set up the Facebook Platform, ready for your new application
Read Getting to Grips with the Facebook Platform in full

Getting Started – An Introduction to GML

by Matthew DeLucas | April 2014 | Open Source

GML or GameMaker Language is a great tool for expanding the already vast variety of tools provided by GameMaker: Studio. GML scripts allow users to write their own code, creating an organized codebase that is easier to modify and debug than GameMaker: Studio's built-in drag-and-drop functionality.

Before exploring GML's use in creating actual games, this article by Matthew DeLucas, the author of GameMaker Game Programming with GML, will go over the basics of the language, such as the following components:

  • Syntax and formatting
  • Variables
  • Functions
  • Statements
  • Arrays
Read Getting Started – An Introduction to GML in full

Getting Started withRapidWeaver

by Joe Workman | September 2012 | Beginner's Guides

In this article, we are going to hit the ground running. We are going to go from zero to a deployed website by the end of this article. This means that we are going to see an in-depth review of every setting.

Read Getting Started withRapidWeaver in full
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