Ruby Under a Microscope by Shaughnessy, Pat -- Read -- Imperial Library of Trantor

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Preface 1. Tokenization, Parsing and Compilation

Tokens: the words that make up the Ruby language Experiment 1-1: Using Ripper to tokenize different Ruby scripts Parsing: how Ruby understands the code you write Experiment 1-2: Using Ripper to parse different Ruby scripts Compilation: how Ruby translates your code into a new language Experiment 1-3: Using the RubyVM class to display YARV instructions Tokenization, parsing and compilation in JRuby Tokenization, parsing and compilation in Rubinius

2. How Ruby Executes Your Code

YARV's internal stack and your Ruby stack Experiment 2-1: Benchmarking Ruby 1.9 vs. Ruby 1.8 Local and dynamic access of Ruby variables Experiment 2-2: Exploring special variables How YARV controls your program's execution flow Experiment 2-3: Testing how Ruby implements for loops internally How JRuby executes your code How Rubinius executes your code

3. Objects, Classes and Modules

What's inside a Ruby object? Experiment 3-1: How long does it take to save a new instance variable? Deducing what's inside the RClass structure Experiment 3-2: Where does Ruby save class methods? How Ruby implements modules and method lookup Experiment 3-3: Modifying a module after including it Objects, classes and modules in JRuby Objects, classes and modules in Rubinius

4. Hash Tables

Hash tables in Ruby Experiment 4-1: Retrieving a value from hashes of varying sizes How hash tables expand to accommodate more values Experiment 4-2: Inserting one new element into hashes of varying sizes How Ruby implements hash functions Experiment 4-3: Using objects as keys in a hash Hash tables in JRuby Hash tables in Rubinius

5. How Ruby Borrowed a Decades Old Idea From Lisp

Blocks: Closures in Ruby Experiment 5-1: Which is faster: a while loop or passing a block to each? Lambdas and Procs: treating functions as a first class citizen Experiment 5-2: Changing local variables after calling lambda Metaprogramming and closures: eval, instance_eval and binding Experiment 5-3: Using a closure to define a method Closures in JRuby Closures in Rubinius

Conclusion

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