Reading Notes for Day 9 of 301:

Readings: Functional Programming

Reading Functional Programming Concepts

• What is functional programming?

From the reading and Wikipedia - 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

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

From the reading: It returns the same result if given the same arguments (it is also referred as deterministic) It does not cause any observable side effects

• What is immutability?

A characteric of not changing.

• What is Referential transparency?

From the reading: Basically, if a function consistently yields the same result for the same input, it is referentially transparent.

Essentially a function that gives consistent results.

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

• What is a module?

It’s a segment of code that has a certain specific functionality, that is segregated into it’s own file.

• What does the word ‘require’ do?

It imports external files and libraries into our files when we are using Express.

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

We require it.

• What do we have to do to make a module available? We have to require it and then make it available for use.

Things I want to know more about:

I’m pretty good, or totally confused, not sure.