Getting Started with Rails
1 Guide Assumptions This guide is designed for beginners who want to get started with a Rails application from scratch. It does not assume that you have any prior experience with Rails. Rails is a web application framework running on the Ruby programming language. If you have no prior experience with Ruby, you will find a very steep learning curve diving straight into Rails.
A Game To Educate Kids About The Future Of Cities And Energy
Looking a bit like the Sims video game, Plan It Green is a new online challenge that aims to teach kids about the realities of city development, and energy management. Aimed at middle schoolers, players get to be mayor for a day, and make decisions about where to build houses and lay down roads, whether to use revenue to construct parks, bike paths, organic farms and wildlife preserves, and how to balance out dirtier forms of energy production with cleaner, but less dependable, renewable power. Developed jointly by The Center For Science (a network of science centers), National Geographic, and General Electric, it is free and open for play now. There is a useful tutorial, and an explanatory video (see below). "By having kids be the maker of their own city, they have to make choices," says Meg Chapman, a communications director at GE. "They have to keep the power on, make it as clean as possible, and keep their citizens happy, and informed.
Programming Ruby 1.9
About this Book 944 pages Published: Release: P5.0 (2012-10-16) ISBN: 978-1-93435-608-1 Would you like to go from first idea to working code much, much faster? Do you currently spend more time satisfying the compiler instead of your clients or end users? Are you frustrated with demanding languages that seem to get in your way, instead of getting the work done?
10 Minutes to Your First Ruby Application
By James Britt 2012-11: The code and article has been updated to fix some errors and to work with Ruby 1.9.3 At the time it was written, and because of where it was originally published, it was targeted (more or less) at people working on Windows, so there may be a few unstated assumptions in the text. On the other hand, the command-line examples seem to reflect a unix shell, no doubt because that's where the bulk of the content was created.
6. Flow Control
Ahhhh, flow control. This is where it all comes together. Even though this chapter is shorter and easier than the methods chapter, it will open up a whole world of programming possibilities. After this chapter, we'll be able to write truly interactive programs; in the past we have made programs which different things depending on your keyboard input, but after this chapter they will actually different things, too. But before we can do that, we need to be able to compare the objects in our programs.
Distributed energy: Driving the ghosts out of the machine
The folks over at Platts have a feature on distributed energy called “the ghost in the machine.” That title is ironic, for reasons I’ll get into in a minute. Still, it’s great to see outfits like Platts taking note of this stuff. For a broad view of the same trend, check out my post on “the next big thing in energy: decentralization.”
Metaprogramming Ruby
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zenspider.com by ryan davis
Table of Contents Language General Tips These are tips I’ve given over and over and over and over… Use 2 space indent, no tabs. Use [] over Array.new.
String
str % arg → new_str click to toggle source Format—Uses str as a format specification, and returns the result of applying it to arg. If the format specification contains more than one substitution, then arg must be an Array or Hash containing the values to be substituted. See Kernel::sprintf for details of the format string.
on Thomas Pynchon's Mason and Dixon, Part 3 [includes Topics and a Map]
Large conclusions seem inappropriate for this present stage of earliness in our reception of this wonder-filled new gift from Pynchon. We need to keep our discussions as open and wide-ranging and undogmatic as possible, to place the novel's comic and tragic world views in continual juxtaposition. We need to keep our humility and our sense of humor about us as well, even as we try for readings as ambitious as the novel clearly is. We need to meditate on the irony that Pynchon's deepest exploration of aging and mortality may be also the novel whose humor is freest and most liberated, the book in which Pynchon is able to satirize most trenchantly those personal and artistic traits---creative paranoia and a mania for invisibility---for which he is most notorious.
Documentation
Here you will find pointers to manuals, tutorials and references that will come in handy when you feel like coding in Ruby. Installing Ruby Unless you only want to try Ruby in the browser (see the links below) you need to have Ruby installed on your computer. You can check whether Ruby already is available by opening a terminal and typing This should output some information on the installed Ruby version.
