Chuloo

// We have an array with numbers
const numbers = [2, 4, 6, 8, 32, 100]

// Create function to filter any array
const functionToFilterNumbers = function(number){
	return number > 5;
}

// Filter the 'numbers' array
const filtered = numbers.filter(functionToFilterNumbers)

Chuloo

// Create new array
const ages = [14, 12, 18, 21, 10];

// filter array for numbers in a range
const canSeeDeadpool = ages.filter(function(age){
  return age >= 18;
})

// display new filtered array
console.log(canSeeDeadpool);

Chuloo

// Create array of students
const students = [
  {
    name: 'Peter',
    score: 50
  },
  {
    name: 'Sarah',
    score: 40
  },

Chuloo

// Create array of continents
const places = ['Africa', 'Asia', 'Europe', 'Australia'];

// Filter array for continents beyond the array index of 1
const overIndex = places.filter(function(place, index){
  return index > 1;
})

// Display new Array
console.log(overIndex);

Chuloo

// new array
const words = ['Hello', 'world!'];

// join elements in array
const greeting = words.join(' ');

// display new string
console.log(greeting);

Chuloo

// new string with commas
const stringWithCommas = 'I, want, to, come, home';

// split string by the commas into an array
const wordArray = stringWithCommas.split(', ')

// join array into a string with a space as separator.
const stringWithoutCommas = wordArray.join(' ');

// display new string

Chuloo

// create new array
const newArray = ['a', 'new', 'array']

// join array with no spaces
const simpleString = newArray.join('')

// join array with dashes
const dashedString = newArray.join('-')

// display new strings

Chuloo

const items = ['nail', 'hammer', 'bolt'];

// find array item with index of 1
const atIndex = items.find(function(element, index){
  return index === 1
})

// display array item found
console.log(atIndex)

Chuloo

// Create new array
const array = [2, 5, 10, 8, 20]

// Create test function
const testFunction = number => number % 5 === 0

// Apply function
const result = array.some(testFunction)

// Display result

Chuloo

// Age of users
const ages = [17, 18, 22, 25];

// Age threshold to drive
const drivingAge = 16;

// Test users for who can drive
let canDrive = ages.every(function(age){return age >= drivingAge;});

console.log(canDrive)