Reading-Notes

Class 09 Summary:

Functional Programming in Javascript:

• Functional Programming : is functional programming using to structure the code and the components . take arguments as input and then show output.

• Pure Function : Functions when take the same arguments return the same output . and the function application has no side effects.

• Pure Function Benefits :
  1. testable.
  2. produce the same result if send the same arguments.
  3. make refactoring code much easier.

• immutability: not change by time and we can’t change it after created it. you can create new object with new value.

• Referential transparency : term used in functional programming, means to give the function and the input value and get the same output. No external state used in the function.

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Node.js:

• Module: simple or complex functionality organized in single or multiple JavaScript files. Includes three types: (core, local and third party).

• require : is a built-in function with a special purpose (to load modules).

• we use (module.export) to make it a vailable to other files. return the module use (require (./)).

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• Sources :

source 1

source 2