tuvo1106

const example = [1,2,5,7,9,11,13,17,19]
const example2 = [-2,5,8,14,1,5,-9,-10,2]

avgWithReduce = function(arr) {
  return arr.reduce(function(acc, number) {
    // add accumulator to average of each number
    return acc + number/arr.length
    // set initial value to 0
  }, 0)
}

tuvo1106

// An simple zip function with reduce()

const example = [[1,2,3], [4,5,6], [7,8,9]]

const zip = arr => {
  //loop through outter array
  return arr.reduce(function(outter, inner) {
    // loop through inner arrays
    inner.forEach(function(num, i) {
      // check if there is an array to add zipped values to

tuvo1106

function getResults(a, b) {
  var square1 = a * a;
  var double2 = b * 2;
  var sum = square1 + double2;
  var answer = sum - (a * 2);
  if (answer % 2 === 0) {  // is even
    answer *= 5;
  } else {
    answer *= 10;
  }

tuvo1106

const getCleanerResults = (a,b) =>  {
  return checkPrime(add101(multiply5or10(subtract(sum(square(a), double(b)), a))))
}

const square = x => x**2
const double = x => x * 2
const sum = (a,b) => a + b
const subtract = (a,b) => a - b * 2
const multiply5or10 = x => (x % 2 === 0) ? x * 5 : x * 10
const add101 = x => x + 101

tuvo1106

// deep clone
const deepClone = obj => {
  // check to see if argument is an array/object and assign it to new variable
  const newObj = (Array.isArray(obj) 
    ? [] 
    : {})
  // loop through keys of object OR indexes of array
  // Object.entries() work for arrays!
  for (const [k, v] of Object.entries(obj)) {
    // start deep clone

tuvo1106

let ex = ['a', 'b', 'c']
let ex1 = [['a','b'], [['c']]]
let ex2 = {
  a: 1,
  b: 2,
  c: 3
}
let ex3 = {
  a: [1,2,3, {g: 6, h: 7}],
  b: {

tuvo1106

const object1 = {name: 'Tu', hobbies: 'coding'}

copyAndCreateNewObject = (prevObj, key, value) => {
  const obj = {}
  for (let k in prevObj) {
    obj[k] = prevObj[k]
  }
  obj[key] = value
  return obj
}

tuvo1106

const object1 = {name: 'Tu', hobbies: 'coding'}
createNewObjectWithES6 = (prevObj, key, value) => {
  return {
    ...prevObj,
    [key]: value
  }
}

console.log(createNewObjectWithES6(object1, 'age', 31))
// { name: 'Tu', hobbies: 'coding', age: 31 }

tuvo1106

const addWithLoops = x => {
  // initializes variable sum to 0
  let sum = 0
  // loop through all numbers 0 to 100
  for (let i = 0; i <= x; i++) {
    // checks each number if is divisible by 2
    if (i % 2 === 0) {
      // adds number to variable sum if it is
      sum += i
    }

tuvo1106

const addWithRecursion = x => {
  // base case
  return x <= 0
    // ends function when x hits 0
    ? 0
    // checks if x divides evenly by 2
    : x % 2 === 0
      // retains x and adds it to the function call of x - 1
      ? x + addWithRecursion(x - 1)
      // ignores x and moves on to the function call of x - 1