June 2016
Beginner to intermediate
292 pages
6h 8m
English
Content preview from Mastering JavaScript Object-Oriented ProgrammingBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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The builder pattern
Another way to delegate the task of creating objects to another object is using the builder pattern. This pattern is used to create complex objects that usually require a step-by-step approach.
In the classical definition, this pattern involves the following actors:
- The client: This is the object that needs a new object
- The director: This is the actor who knows how to create an object, that is, it knows the necessary steps to get an object built
- The builder: This actor actually builds the object by providing methods used by the director
- The product: It is the resulting object built by the builder under the control of the director
In a nutshell, the client asks for a product from the director, who creates it by means of the builder. ...
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