JS assignment.js

# Arrays Exercise

Here we'll go through some arrays that highlight the various Array Methods in JavaScript.

```
const inventors = [
  'Albert Einstein',
  'Issac Newton',
  'Galileo Galilei',
  'Marie Curie',
  'Johannes Kepler',
  'Nicolaus Copernicus',
  'Max Planck',
  'Katherine Blodgett',
  'Ada Lovelace',
  'Sarah E. Goode',
  'Lise Meitner',
  'Hanna Hammarstrom'
];

const numbers = [1, 2, 3, 5, 8, 13, 21, 34, 55];
```

### Filter

* Print out an array of the inventors whose name starts with 'A'.
* Print out an array of the inventors whose name contains 'n'.
* Bonus: print out an array of the inventors whose name has the same letter twice in a row (e.g. nn or mm). 

* Print out an array of the numbers which are odd.
* Print out an array of the numbers that have two digits.
* Bonus: print out an array of the numbers which are prime. 

### Map

* Print out an array of all the inventors' names in uppercase.
* Print out an array of all the first names of each inventor.
* Print out an array of the length of every name. 

* Print out an array of every number multiplied by 100. 
* Print out an array of the powers of two as shown by this array (e.g. 2, 4, 8, 16 ....).

### Sort

* Sort all the inventors in alphabetical order, A-Z.
* Sort all the inventors in reverse alphabetical order, Z-A. Do _not_ use the `reverse` method.
* Sort all the inventors by length of name, shortest name first.
* Sort all the inventors by length of name, longest name first. Do _not_ use the `reverse` method.

* Sort the numbers until you see the following: [1, 10, 11, 12, 13, 2, 3, 4, 5, 6, 7, 8, 9].

### Reduce

* Find the sum of all the numbers.
* Find the sum of all the even numbers.

* Create a string that has the first name of every inventor. 

### Some / Every

* Does any inventor have the letter 'y' in their name?
* Does every inventor have the letter 'e' in their name?
* Does every inventor have first name that's longer than 4 characters?

### Find / FindIndex

* Find the inventor that has a middle name. 
* Bonus: Return a new array without inventor with a middle name.

### Rocket 1

That number array is called the Fibonacci Sequence. Every number is the sum of the two previous numbers. Create a function, `fib(n)` that gives you the nth entry.