script.js

/*
Exercise 1: Define an empty array
*/

const foods = []

console.log('Exercise 1 result:', foods)

/*
Exercise 2: Add strings to the array
*/
foods.push('pizza', 'cheeseburger')

console.log('Exercise 2 result:', foods)
/*
Exercise 3: Insert at the beginning
*/

foods.unshift('taco')
console.log('Exercise 3 result:', foods)

/*
Exercise 4: Access an array element
*/

let favFood = foods[1]

console.log('Exercise 4 result:', favFood)
/*
Exercise 5: Insert an element between two others
*/

foods.splice(2, 0, 'tofu')

console.log('Exercise 5 result:', foods)
/*
Exercise 6: Replace elements
*/

foods.splice(1, 1, 'sushi', 'cupcake')

console.log('Exercise 6 result:', foods)
/*
Exercise 7: Using the `slice()` 
*/

const yummy = foods.slice(1, 3)

console.log('Exercise 7 result:', yummy)

/*
Exercise 8: Finding an index
*/
const soyIdx = foods.indexOf('tofu')

console.log('Exercise 8 result:', soyIdx)

/*
Exercise 9: Joining elements:
*/
const allFoods = foods.join(' -> ')
console.log('Exercise 9 result:', allFoods)

/*
Exercise 10: Check for an element:
*/

const hasSoup = foods.includes('soup')
console.log('Exercise 10 result:', hasSoup)

/*
Exercise 11: Odd numbers from an array
*/

const nums = [100, 5, 23, 15, 21, 72, 9, 45, 66, 7, 81, 90]
let odds = []
let counter = 0
for (let i = 0; i < nums.length; i++) {
  if (nums[i] % 2 == 1) {
    odds[counter] = nums[i]
    counter++
  }
}

console.log('Exercise 11 result:', odds)

/*
Exercise 12: FizzBuzz with arrays
*/
let fizz = []
let buzz = []
let fizzbuzz = []
let c1 = 0
let c2 = 0
let c3 = 0
for (let i = 0; i < nums.length; i++) {
  if (nums[i] % 3 == 0) {
    fizz[c1] = nums[i]
    c1++
  }
  if (nums[i] % 5 == 0) {
    buzz[c2] = nums[i]
    c2++
  }
  if (nums[i] % 3 == 0 && nums[i] % 5 == 0) {
    fizzbuzz[c3] = nums[i]
    c3++
  }
}

console.log('Exercise 12 Results:')
console.log('  fizz:', fizz)
console.log('  buzz:', buzz)
console.log('  fizzbuzz:', fizzbuzz)

/*
Exercise 13: Retrieve the Last Array
*/

const numArrays = [
  [100, 5, 23],
  [15, 21, 72, 9],
  [45, 66],
  [7, 81, 90]
]
const numList = numArrays[numArrays.length - 1]
console.log('Exercise 13 result:', numList)

/*
Exercise 14: Accessing within nested arrays*/

num = numArrays[2][1]

console.log('Exercise 14 result:', num)

/*
Exercise 15: Nested array sum
*/
let totalTemp = []
let total = 0
c = 0
for (let i = 0; i < numArrays.length; i++) {
  for (let j = 0; j < numArrays[i].length; j++) {
    totalTemp[c] = numArrays[i][j]
    total += totalTemp[c]
    c++
  }
}

console.log('Exercise 15 result:\n', total)