June 2014
Intermediate to advanced
536 pages
15h 18m
English
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Chapter 15. Callbacks, hooks, and runtime introspection
This chapter covers
- Runtime callbacks: inherited, included, and more
- The respond_to? and method_missing methods
- Introspection of object and class method lists
- Trapping unresolved constant references
- Examining in-scope variables and constants
- Parsing caller and stack trace information
In keeping with its dynamic nature and its encouragement of flexible, supple object and program design, Ruby provides a large number of ways to examine what’s going on while your program is running and to set up event-based callbacks and hooks—essentially, tripwires that are pulled at specified times and for specific reasons—in the form of methods with special, reserved names for which you can, if you wish, ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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