Download E-books Ruby Wizardry: An Introduction to Programming for Kids PDF

By Eric Weinstein

The Ruby programming language is ideal for newcomers: effortless to profit, robust, and enjoyable to take advantage of! yet would it not be extra enjoyable in case you have been studying with the aid of a few wizards and dragons?

Ruby Wizardry is a playful, illustrated story that may train you the way to application in Ruby via taking you on a fantastical trip. As you keep on with the adventures of younger heroes Ruben and Scarlet, you will study genuine programming abilities, like how to:

  • Use primary options like variables, symbols, arrays, and strings
  • Work with Ruby hashes to create a programmable breakfast menu
  • Control application movement with loops and conditionals to assist the Royal Plumber
  • Test your wild and loopy rules in IRB and retailer your courses as scripts
  • Create a category of mini-wizards, each one with their very own superpower!
  • Organize and reuse your code with tools and lists
  • Write your individual notable interactive tales utilizing Ruby

Along the best way, you are going to meet colourful characters from round the nation, just like the hacker Queen, the Off-White Knight, and Wherefore the minstrel. Ruby Wizardry could have you (or your little wizard) addicted to programming in no time.

For a while 10+ (and their parents!)

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203 Contents in Detail   xiii 10 A Horse of a special colour 207 Utter Panda-monium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207 developing Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211 Constants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213 Extending Your wisdom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214 Mixins and Inheritance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215 Requiring one other dossier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217 having a look Up Constants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221 A Horse of a unique colour . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224 you recognize This! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227 eleven moment Time’s the allure 233 Refactoring on the Refactory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233 Variable task methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237 Crystal-Clear Conditionals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240 in case you want a case assertion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242 Simplifying equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244 De-duplicating Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249 Re-refactoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255 you recognize This! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258 12 studying, Writing, and Ruby Magic 265 dossier enter and Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265 commencing a dossier with Ruby . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268 Writing and including to documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270 heading off blunders whereas operating with documents . . . . . . . . . . . . . . . . . . . . . . . . 275 All Loading Docks, document for responsibility! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277 you recognize This! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 280 thirteen persist with the WEBrick street 285 Ruby and the web . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285 utilizing the open-uri Ruby Gem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287 Investigating the Kingdom’s Web Server . . . . . . . . . . . . . . . . . . . . . . . . . . 290 past the dominion partitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296 you recognize This! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298 xiv   Contents intimately 14 the place to head subsequent 301 the large photo: What you recognize . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301 extra assets and Further Reading . . . . . . . . . . . . . . . . . . . . . . . . 304 newbie Books . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304 Intermediate Books . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305 complicated Books . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306 on-line and Multimedia . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306 Interactive assets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307 extra issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308 A fitting Ruby on Mac and Linux 313 fitting on Mac . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313 fitting on Linux . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314 B Troubleshooting 315 blunders working Ruby Scripts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315 Command now not came upon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316 No Such dossier or listing .

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