Reading-Notes

Class 09: Functional Programming

• Functional Programming Concepts

• Node JS Tutorial for Beginners #6 - Modules and require()

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Functional Programming Concepts

• What is functional programming?

  - style of building the architecture of your program.
  

• What is a pure function and how do we know if something is a pure function?

  - it is deterministic or returns the same result if given the same arguments
  - it does not cause any side effects
  

• What are the benefits of a pure function?

  - easier to test
  

• What is immutability?

  - something that is unchanging or can't change
  

• What is Referential transparency?

  - expressions in a program can be changed by its value without changing the results of the program.
  

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Node JS Tutorial for Beginners #6 - Modules and require()

• What is a module?

  - a piece of code that has a certain functionality needed in the application  you are creating in node.js it's just like how react has separate components that do stuff.
  

• What does the word ‘require’ do?

  - it creates a global object
  

• How do we bring another module into the file the we are working in?

  - we set the module with the functionality to a variable then require setting it to a global object.
  

• What do we have to do to make a module available?

  -module.export = (whatever module you want available)
  

things I want to know more

    - creating separate modules in node.js