Functional Programming

Pure Functions

Functions that given the same arguments, they will always produce the same result

higher order functions

.forEach()

.map()

.reduce()

A function that takes in a function as a parameter OR returns a function as its result.

Immutability

A design process that treats your objects state as unchangeable 

lodash.js

_.times(n, [iteratee=_.identity])

A much easier on the eyes for loop where n represents the number of loops

_.union([arrays])

takes in multiple arrays and will return new array with unique elements

_.intersection([arrays])

takes in multiple arrays and finds values present in all arrays and orders them

Finds a random number between two provided numbers

_.random([lower=0], [upper=1])

_.memoize(func)

Optimizes a function by caching its result thus speeding up it's future calls