March 2019
Intermediate to advanced
584 pages
19h 5m
English
Content preview from The Well-Grounded Rubyist, Third Edition
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Chapter 10. Collections central: Enumerable and Enumerator
This chapter covers
- Mixing Enumerable into your classes
- The use of Enumerable methods in collection objects
- Strings as quasi-enumerable objects
- Sorting enumerables with the Comparable module
- Enumerators
All collection objects aren’t created equal—but an awful lot of them have many characteristics in common. In Ruby, common characteristics among many objects tend to reside in modules. Collections are no exception: collection objects in Ruby typically include the Enumerable module.
Classes that use Enumerable enter into a kind of contract: the class has to define an instance method called each, and in return, Enumerable endows the objects of the class with ...
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