CLASS 06

REVIEW, RESEARCH AND DISCUSS

• HOME

WHAT’S A SINGLETON?

• Singleton is a class that allows only a single instance of itself to be created and gives access to that created instance.

Explain how the Singleton pattern can be used with Node modules, specifically with classes

• Can be used to make sure that you have one and only one instance of an object.

### TERMS:

Router Middleware

Is a function that has route information and used as a called callback between request and response.

Singleton Pattern

Its a design pattern that restricts the instantiation of a class to one “single” instance.

Mock testing

Means creating a fake version of an external or internal service that can stand in for the real one.

CRUD REST

Create ————–> PUT

Create ————–> POST

Read ————–> GET

Update ————–> PUT

Delete ————–> DELETE