Things I want to know more about

What is functional programming?

Functional programming is a programming model, “a style of building the structure and elements of computer programs — that treats computation as the evaluation of mathematical functions and avoids changing-state and mutable data” (quote from article)

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

Something is a pure function if, when given the same arguments, always returns the same result. It also does not cause any “observable side effects.” AKA - if all the variables and values used in the function are given as parameters, it is a pure function

What are the benefits of a pure function?

The benefits of a pure function is that if the global variables ever used are changed, the value accurately scales with the edit

What is immutability?

This means that it’s state cannot be changed after creation

What is Referential transparency?

pure functions + immutable data = referential transparency NodeJS:

Split code up into logical modules Can call modules whenever needed Bare minimum added in each module To run a specific file through node in the console you can type node file_name.extension or node file_name To bring one file into another using node is by typing require ‘./file_name.extension’ at the top of the file where needed To bring in one file, you must say module.exports = function_name or module.exports = class_name at the bottom of the file the data is sent out from

What is a module?

one part (or file) with a specific functionality to achieve a part of a larger goal (many files / functions / classes)

What does the word ‘require’ do?

imports data from another file

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

require ‘./file_name.extension’

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

module.exports = function_name