October 2014
Intermediate to advanced
280 pages
7h 20m
English
Content preview from Programming Elixir
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The Available Types
You can define implementations for one or more of the following types:
Any | Atom | BitString | Float | Function | Integer |
List | PID | Port | Record | Reference | Tuple |
The type BitString is used in place of Binary.
The type Any is a catchall, allowing you to match an implementation with any type. Just as with function definitions, you’ll want to put the implementations for specific types before an implementation for Any.
You can list multiple types on a single defimpl. For example, the following protocol can be called to determine if a type is a collection:
| protocols/is_collection.exs | |
| | defprotocol Collection do |
| | @fallback_to_any true |
| | def is_collection?(value) |
| | end |
| | |
| | defimpl Collection, for: [List, Tuple, BitString] do |
| | def is_collection?(_), ... |
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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