ArticleS.UncleBob.PrinciplesOfOod The Principles of OOD What is object oriented design? What is it all about? Of all the revolutions that have occurred in our industry, two have been so successful that they have permeated our mentality to the extent that we take them for granted. Programs written in these languages may look structured and object oriented, but looks can be decieving. In March of 1995, in comp.object, I wrote an article that was the first glimmer of a set of principles for OOD that I have written about many times since. These principles expose the dependency management aspects of OOD as opposed to the conceptualization and modeling aspects. Dependency Management is an issue that most of us have faced. The first five principles are principles of class design. The next six principles are about packages. The first three package principles are about package cohesion, they tell us what to put inside packages: Sincerely, Henrik Robert, yes thank you, I'm aware of those. OOP is too flexible. No, we aren't stuck.
Home - Open.Source - everything ! FREE SOFTWARE !!! for Windows, Linux & Mac Online javascript beautifier Learn HTML 5 in 3 days – Day 1 Introduction HTML 5 is one of the hot topic recent days. So I thought why don’t write a complete learning tutorial about same. It’s going to be a 2 days series article. Note: As a Microsoft guy whenever there is a need for server side technology I will be using C# and Asp.Net. What we won’t cover here? If you don’t know anything about HTML then this article is not for you. You can learn about basic HTML here. Agenda Introduction to HTML 5 Let’s first understand couple of basic and intriguing features about HTML unaware to most of the developers. What is difference between SGML, HTML and XML? What is difference between SGML, HTML and XML? SGML stands for Standard Globalized Markup language is the one used for defining standard markup languages. What is Doc type? When you try to create a HTML page using tools like Dreamweaver or Visual studio you will find following line at the top of the document always. Have you ever wondered what it is? How HTML 5 is different from previous versions? Number Range
jQuery Plugin: Tokenizing Autocomplete Text Entry | James Smith • loopj.com This Project Has Moved! For the latest version and awesome documentation, please head over to: Overview This is a jQuery plugin to allow users to select multiple items from a predefined list, using autocompletion as they type to find each item. Features Intuitive UI for selecting multiple items from a large list Layout controlled fully in CSS, easily customisable Result caching reduces server load No images required, just the plugin’s .js file and some CSS Handles json search data for autocompletion Smooth animations when results load Select items using the mouse or keyboard Screenshots Vertical list style item selection Facebook style item selection Demo A live demo of the token input is available here. Usage Latest documentation can be found here: License This plugin is released under a dual license. Quick Download Please don’t use these links directly in your scripts, I might change their location at any time. Github Project About the Author
Introduction — Problem Solving with Algorithms and Data Structures We stated earlier that Python is an object-oriented programming language. So far, we have used a number of built-in classes to show examples of data and control structures. One of the most powerful features in an object-oriented programming language is the ability to allow a programmer (problem solver) to create new classes that model data that is needed to solve the problem. Remember that we use abstract data types to provide the logical description of what a data object looks like (its state) and what it can do (its methods). A Fraction Class A very common example to show the details of implementing a user-defined class is to construct a class to implement the abstract data type Fraction. A fraction such as consists of two parts. The operations for the Fraction type will allow a Fraction data object to behave like any other numeric value. In Python, we define a new class by providing a name and a set of method definitions that are syntactically similar to function definitions.
Blog » Blog Archive » Ruby on Rails - Multiple database connections 21 Apr Found a need for this information while answering questions on railsforum. So, let's say that we want to use two databases and let's even say that we want to use an Oracle database and a MySQL database. How can this be done? To start, we must decide which database will be our default database. In this scenario, I chose MySQL. So we have all seen that before. But, I need to use data from an oracle database, so let's setup that connection: Neat, we have two development connections. The line we need to add is this: Even better, we can make this dynamic, so when we are in the test or production environment, we don't need to change the establish_connection line. So the final product could look something like this: database.yml Oracle model example That should be it. ShareThis
SYWorks Programming: WAIDPS [Wireless Auditing, Intrusion Detection & Prevention System] Tutorial / Explanations - Part 4 Network Cracking (Auditing) Module WAIDPS also include with the Network auditing Module which allow user to crack a WEP encrypted access point (AP), capturing of WPA/WPA2 Handshake for cracking of WPA Passphase and also bruteforcing the PIN of a Wi-Fi Protected Setup (WPS) enabled router which thereafter revealing the WPA passphase. Apart from cracking of encrypted acess point, WAIDPS also include a “Live Monitoring” of Access Point which will show the detail of wireless clients associated to the specific Access Point. WARNING : The Network Cracking Module is strictly for auditing your own network or mutual consent of auditing someone network. Network Auditing Main Menu In order to get into the ‘Network Auditing’ selection menu, user can press [Enter] on the main menu followed by [A] to get into the auditing module. Note : Please allow the WiFi Harvester to harvest for access points and clients detail in the main screen before selecting the “Auditing Network” module.
Aho/Ullman Foundations of Computer Science This book has been taken out of print by W. H. Freeman. --- Al Aho and Jeff Ullman Index The Book | Materials | Gradiance | Errata PDF's of the Book PrefaceTable of ContentsChapter 1 Computer Science: The Mechanization of Abstraction Chapter 2 Iteration, Induction, and Recursion Chapter 3 The Running Time of Programs Chapter 4 Combinatorics and Probability Chapter 5 The Tree Data Model Chapter 6 The List Data Model Chapter 7 The Set Data Model Chapter 8 The Relational Data Model Chapter 9 The Graph Data Model Chapter 10 Patterns, Automata, and Regular Expressions Chapter 11 Recursive Description of Patterns Chapter 12 Propositional Logic Chapter 13 Using Logic to Design Computer Components Chapter 14 Predicate Logic Index Supplementary Materials Gradiance Package Available Gradiance is offering a free trial of its automated homeworks for the topics covered by this book. Errata Sheet We are going to try to maintain errata.
20 Fresh JavaScript Data Visualization Libraries There are plenty of JavaScript libraries out there for rendering your otherwise plain and boring numerical data into beautiful, interactive, and informative visualizations. The beauty of using JavaScript for data visualization is that, if created correctly, your data will be highly accessible (usually via HTML tables). A long time ago (2008), I wrote about JavaScript solutions for graphing and charting data and this article revisits the topic with twenty more JavaScript libraries that you can use to bring your data to life. 1. Highcharts Highcharts is one of the most promising JavaScript charting libraries to hit the scene recently, with its large array of features including seven charting types (line, pie, and bar among them), the ability to zoom in and out of charts, and tooltips for offering more information about data points. 2. gRaphaël gRaphaël is a charting library based on Raphaël, a vector graphics drawing JavaScript library. 3. 4. jQuery Visualize Plugin 5. moochart 6. 7. dygraphs