Speech Synthesis API

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Here is a brand new addition to browser API's, the Speech Synthesis API.  It is used to make the browser read text out loud to the viewer, and can be implemented for many different...

Publisher / Subscriber Pattern

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This Lesson teaches the Publisher / Subscriber pattern, which is used to allow modules to communicate with eachother without hard dependencies. It is a great pattern for decoupling modules in your program It is very...

Decorator Pattern

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Structural pattern used to add new functionality to existing objects using JavaScript we can extend classes whenever we want, but the decorator pattern is still used to minimize the amount of sub-classes we will...

Observer Pattern

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closely related to pubsub pattern, in fact, many people think of pubsub as a special use of the observer pattern difference is that pubsub create global message buss for communication between components, while observer is...

Adapter Pattern

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Used to convert one interface to another an objects interface is the method and properties exposed by the object, what we use to interact with the object useful pattern when something changes and...

Factory Pattern

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The factory pattern consists of a collection of objects, a factory, and a client that requires instances of the objects. The client controls the process, but is decoupled from the actual construction of...

Mediator Pattern

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Situation: If you have multiple independent modules that work in a system (parts of a web page or a user interface system) and they must be kept seperate from eachother and aren't allowed...

Iterator Pattern

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Javascript itself has iteration built into the language there are a number of for and forEach methods to iterate through arrays we have the forIn loop to iterate through objects Iterator pattern is different as it doesn't...

Composite Pattern

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Used to treat single objects or collections of objects in the same way Compositions are used to create nested structures of nodes a node may be a single node (leaf) or a container of nodes ...

Client Case Studies