May 2009
Intermediate to advanced
520 pages
16h 48m
English
Content preview from The Well-Grounded Rubyist
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Chapter 14. Callable and runnable objects
In this chapter
- Proc objects as anonymous functions
- The lambda (a.k.a. proc) method
- Code blocks
- The Symbol#to_proc method
- Method objects
- Bindings
- The eval family of methods
- Threads
- Executing external programs
In addition to the basic, bread-and-butter method calls that account for most of what happens in your program, Ruby provides an extensive toolkit for making things happen in a variety of ways. You need two or more parts of your code to run in parallel? Create some Thread objects and run them as needed. Want to choose from among a set of possible functions to execute, and don’t have enough information in advance to write methods for them? Create an array of Proc objects—anonymous functions—and ...
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