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A Tour of ruby

A Tour of ruby. 2011 ACM Class, Dong Xie. What is Ruby?. Dynamic programming language Complex but expressive grammar A core class library with rich and powerful APIs Draws inspiration from Lisp , Smalltalk and Perl Easy for C and Java programmers to learn

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A Tour of ruby

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  1. A Tour of ruby 2011 ACM Class, Dong Xie

  2. What is Ruby? • Dynamicprogramming language • Complex but expressive grammar • A core class library with rich and powerful APIs • Draws inspiration from Lisp, Smalltalk and Perl • Easy for C and Java programmers to learn • Ruby is designed to make programmers happy. ——By Yukihiro Matsumoto

  3. Simplified Expressions • Optionalparentheses • Parallel assignment • Punctuation Suffixes and Prefixes

  4. Everything is an Object • Completelyobject-oriented language • Seeing Everything as an Object • even simple numeric literals and the values true, false and nil • Only single inheritance, the Mixin(Module)

  5. Everything has a value • NOdifference between expressionsand statements • Everything has a value, even if that value is nil • Even control structures have their own value such as if, while, etc.

  6. Classes are Open • Dynamic Programming Language • Not only dynamic-typed (like python, PHP, etc.) • Allows its users to freely alter its parts • Add, Remove, Redefine

  7. Singleton methods • Per-object methods • Only available on the Object you defined it on

  8. Iterators and Blocks • “A truly expressive feature” • Iterators —— loops • Blocks—— associate with a method invocation

  9. Procs and Lambdas • Class Proc, Kernel.Lambda • Functions that can be manipulated as objects • Block as a single parameter • Instances of class Proc as parameters

  10. And more… • Symbols are not lightweight strings • “Variable” constants • Fake keyword parameters • The universal truth • Missing methods • Metaprogramming capability • Packages —— RubyGems • ……

  11. To learn more… • Official Site: http://www.ruby-lang.org/en/ • Ruby in a Nutshell • The Ruby Programming Language • The Book of Ruby • Programming Ruby • Ruby Cookbook

  12. Q&A Any questions are welcomed…

  13. Thanks for Listening Contact: xiedong1993@gmail.com

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