Design and Analysis of Algorithms I About the Course In this course you will learn several fundamental principles of algorithm design. You'll learn the divide-and-conquer design paradigm, with applications to fast sorting, searching, and multiplication. You'll learn several blazingly fast primitives for computing on graphs, such as how to compute connectivity information and shortest paths. Finally, we'll study how allowing the computer to "flip coins" can lead to elegant and practical algorithms and data structures. Course Syllabus Week 1: Introduction. Week 2: Running time analysis of divide-and-conquer algorithms. Week 3: More on randomized algorithms and probability. Week 4: Graph primitives. Week 5: Dijkstra's shortest-path algorithm. Week 6: Further data structures. Recommended Background How to program in at least one programming language (like C, Java, or Python); and familiarity with proofs, including proofs by induction and by contradiction. Suggested Readings No specific textbook is required for the course.
Ruby in Twenty Minutes Introduction This is a small Ruby tutorial that should take no more than 20 minutes to complete. It makes the assumption that you already have Ruby installed. (If you do not have Ruby on your computer install it before you get started.) Interactive Ruby Ruby comes with a program that will show the results of any Ruby statements you feed it. Open up IRB (which stands for Interactive Ruby). If you’re using macOS open up Terminal and type irb, then hit enter. irb(main):001:0> Ok, so it’s open. Type this: "Hello World" irb(main):001:0> "Hello World" => "Hello World" Ruby Obeyed You! What just happened? irb(main):002:0> puts "Hello World" Hello World => nil puts is the basic command to print something out in Ruby. Your Free Calculator is Here Already, we have enough to use IRB as a basic calculator: irb(main):003:0> 3+2 => 5 Three plus two. irb(main):004:0> 3*2 => 6 Next, let’s try three squared: irb(main):005:0> 3**2 => 9 In Ruby ** is the way you say “to the power of”. Ok, wait, what was that last one?
Roadmap for Learning Rails | techiferous Accelerating Your Learning If you have no prior development experience, one of the worst things you can do when learning Rails is to just dive in. Some of the concepts build on each other, so jumping in would be like signing up for a calculus class before you’ve learned algebra. Sure, you could muddle through it, but most of your time would be spent trying to figure out why things aren’t working. Another difficulty for a beginner is figuring out what to learn. SQL, XHTML, CSS, XSS, RDF, RDBMS–what should you drink from the fire hose of acronyms? Another mistake is spending too much time mastering a concept when you only need a basic understanding. Therefore, to accelerate your learning, learn the right things in the right order at the right depth. The following roadmap will help you do exactly that. But First Some Ground Rules… It takes a significant investment of time to learn Rails. Otherwise, you will waste your time learning Rails when all you really needed was WordPress. Ruby Key Concepts
Probabilistic Graphical Models About the Course What are Probabilistic Graphical Models? Uncertainty is unavoidable in real-world applications: we can almost never predict with certainty what will happen in the future, and even in the present and the past, many important aspects of the world are not observed with certainty. Probability theory gives us the basic foundation to model our beliefs about the different possible states of the world, and to update these beliefs as new evidence is obtained. In this class, you will learn the basics of the PGM representation and how to construct them, using both human knowledge and machine learning techniques; you will also learn algorithms for using a PGM to reach conclusions about the world from limited and noisy evidence, and for making good decisions under uncertainty. Course Syllabus Topics covered include: There will be short weekly review quizzes and programming assignments (Octave/Matlab) focusing on case studies and applications of PGMs to real-world problems:
Why's (Poignant) Guide to Ruby #310 Getting Started with Rails Dec 26, 2011 | 7 minutes | Tools Learning Ruby on Rails can be overwhelming, especially if you are new to programming. Here I will take you on a tour through various resources to help get started with Rails. Download: mp4Full Size H.264 Video (22.9 MB)m4vSmaller H.264 Video (13 MB)webmFull Size VP8 Video (9.5 MB)ogvFull Size Theora Video (35.9 MB) Natural Language Processing Ruby Quiz How I Learned Enough Ruby On Rails In 12 Weeks To Launch Freelancify • JamesFend.com (Update February 26, 2013: I have since this post sold Freelancify.com to a new owner) Before I begin, I’d like to recognize Josh Crews ( for convincing me to learn Ruby on Rails; without him and his hours of volunteered mentership and help, I wouldn’t be writing this today. Thank you. I’d also like to address Please do not email me asking me to program your app for equity. On January 23rd, I launched my dream idea, Freelancify.com. And exactly 12 weeks ago, I made the best decision I’ve made in a really, really long time. A correction I’d like to address: Previously, I stated in a post that I learned Rails in 8 weeks; doing an exact recount to launch date, it was more so 12 weeks. What Skills Did I Have Prior To Learning Rails? Why I Decided To Learn It? Sat down that night, and just thought for hours. I decided. My Next 3 Months – Mission: Get an MVP up, had to be enough to work but also not crappy enough to leave a terrible first impression. That’s it guys.
Efficient JavaScript Traditionally, a Web page would not contain much scripting, or at least, not much that would affect the performance of that Web page. However, as Web pages become more like applications, the performance of scripts is having a bigger effect. With more and more applications being developed using Web technologies, improving the performance of scripts is becoming increasingly important. With a desktop application, a compiler is normally used to convert the source into the final binary. The compiler can take its time, and optimize as much as possible for good performance of the final application. Browsers are fairly good at achieving this, and Opera has one of the fastest scripting engines of any current browser. This article will show several simple changes that can be made to improve the performance of your Web applications. Quick Tips ECMAScript Document loading ECMAScript Avoid using eval or the Function constructor Rewrite that eval function getProperty(oString) { return test.prop[oString]; }
Ruby Learning Tutorial RubyLearning.com Helping Ruby Programmers become Awesome! Ruby Study Notes: TOC Core Ruby Programming Introduction InstallationWhat is Ruby? Note: The Ruby Logo is Copyright (c) 2006, Yukihiro Matsumoto. © 2006-2017 RubyLearning.com - A Ruby Tutorial Page Updated: 1st Jan. 2016 | Design: Erwin Aligam | Valid: XHTML | CSS Home | Privacy | Sitemap
Learn Rails by Example book and screencasts by Michael Hartl Michael Hartl Contents Foreword My former company (CD Baby) was one of the first to loudly switch to Ruby on Rails, and then even more loudly switch back to PHP (Google me to read about the drama). Though I’ve worked my way through many Rails books, this is the one that finally made me “get” it. The linear narrative is such a great format. Enjoy! Derek Sivers (sivers.org) Founder, CD Baby Acknowledgments The Ruby on Rails Tutorial owes a lot to my previous Rails book, RailsSpace, and hence to my coauthor Aurelius Prochazka. I’d like to acknowledge a long list of Rubyists who have taught and inspired me over the years: David Heinemeier Hansson, Yehuda Katz, Carl Lerche, Jeremy Kemper, Xavier Noria, Ryan Bates, Geoffrey Grosenbach, Peter Cooper, Matt Aimonetti, Gregg Pollack, Wayne E. About the author Michael Hartl is the author of the Ruby on Rails Tutorial, the leading introduction to web development with Ruby on Rails. Copyright and license Welcome to the Ruby on Rails Tutorial.
Tutorials Video Tutorials Links to videos that cover the Processing basics. Hello Processingby Daniel Shiffman et al.Short video lessons introduce coding exercises that lead to designing an interactive drawing program. Welcome to Processing 3by Daniel ShiffmanWhat's new in Processing 3? Dan walks through the new features and changes. Debugby Daniel ShiffmanLearn how to pause and step through your running code with the Processing 3 Debugger. Plethora Projectby Jose SanchezThese video tutorials cover issues of programming and computational design issues in Processing. Text Tutorials A collection of step-by-step lessons covering beginner, intermediate, and advanced topics.
Ruby on Rails Guides: Débuter avec Rails Ce guide utilise Rails 3.0. Une partie du code montré ici ne fonctionne pas avec les versions précédentes de Rails. 1 Ce que ce guide suppose Ce guide est conçu pour les débutants qui veulent s’initier à la création d’une application Rails. Il ne suppose aucune expérience avec Rails. Cependant, pour vraiment en profiter, voici les pré-requis logiciels indispensables : le langage Ruby, au minimum la version 1.8.7 Note that Ruby 1.8.7 p248 and p249 have marshaling bugs that crash Rails 3.0. Rails est un framework pour le langage Ruby. 2 Qu’est-ce que Rails ? Rails est un framework pour le développement d’applications web écrit avec le langage Ruby. Rails est “opiniâtre” (opinionated software). La philosophie de Rails comprend ces principes fondamentaux : DRY – “Ne vous répétez Pas” (Don’t Repeat Yourself) – suggère qu’écrire et ré-écrire le même code à plusieurs reprises est une mauvaise chose. 2.1 L’architecture MVC 2.1.2 Vues Les vues sont l’interface utilisateur de votre application.