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Functional Programming Concepts

What is functional programming?
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functional programming means using functions to the best effect for creating clean and maintainable software

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

A pure function does not rely on dynamic data such as state, and will always produce the same results with the same arguments provided

What are the benefits of a pure function?

pure functions can be reused without worrying about any dynamic data or state.

What is immutability?

Unable to be modified or changed.

What is Referential transparency?

A function that can be replaced by its value. Some function expressions could be used to represent data, have that data stored to a varible and replace the function with that data.

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

What is a module?

Its a section of code that can be called in when needed with the require keyword. Usually a bit of utlity code, and build like a component.

What does the word ‘require’ do?

require tells Node to import the code specified to use in the application

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

The module needs to be exported with module.exports and each function that will be used needs to be specified. the require function is on the global object. use require(‘./fileName’)

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

export the code in the module, and require the module in the app that will use the functions that are being exported as a module.