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Solved lab #3837

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334 changes: 270 additions & 64 deletions src/functions-and-arrays.js
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Original file line number Diff line number Diff line change
@@ -1,119 +1,325 @@
// Iteration #1: Find the maximum
function maxOfTwoNumbers() {}


function maxOfTwoNumbers(num1, num2) {
if (num1 > num2) {
return num1;
} else if (num2 > num1) {
return num2;
} else if (num1 === num2) {
return num1, num2;
}
}

// Iteration #2: Find longest word
const words = ['mystery', 'brother', 'aviator', 'crocodile', 'pearl', 'orchard', 'crackpot'];

function findLongestWord() {}



const words = [
"mystery",
"brother",
"aviator",
"crocodile",
"pearl",
"orchard",
"crackpot",
];
function findLongestWord(words) {
if (words.length === 0) {
return null;
}

let longestWord = words[0];

for (let i = 1; i < words.length; i++) {
const currentWord = words[i];
if (currentWord.length > longestWord.length) {
longestWord = currentWord;
}
}
return longestWord;
}
// Iteration #3: Calculate the sum
const numbers = [6, 12, 1, 18, 13, 16, 2, 1, 8, 10];

function sumNumbers() {}

function sumNumbers(numbersArr) {
if (!numbersArr) return null;

let sum = 0;
for (let i = 0; i < numbersArr.length; i++) {
const num = numbersArr[i];
sum += num;
}
return sum;
}

// Iteration #3.1 Bonus:
function sum() {}


function sum(arr) {
let sum = 0;
for (let el of arr) {
switch (typeof el) {
case "number":
case "boolean":
sum += el;
break;
case "string":
sum += el.length;
break;
default:
throw new Error("Unsupported data type sir or ma'am");
}
}
return sum;
}

// Iteration #4: Calculate the average
// Level 1: Array of numbers
const numbersAvg = [2, 6, 9, 10, 7, 4, 1, 9];

function averageNumbers() {}
function averageNumbers(numbersArr) {
if (numbersArr.length === 0) return null;

return sumNumbers(numbersArr) / numbersArr.length;
}

// Level 2: Array of strings
const wordsArr = ['seat', 'correspond', 'linen', 'motif', 'hole', 'smell', 'smart', 'chaos', 'fuel', 'palace'];
const wordsArr = [
"seat",
"correspond",
"linen",
"motif",
"hole",
"smell",
"smart",
"chaos",
"fuel",
"palace",
];

function averageWordLength() { }
function averageWordLength(wordsArr) {
if (wordsArr.length === 0) return null;

return sum(wordsArr) / wordsArr.length;
}

// Bonus - Iteration #4.1
function avg() {}
function avg(arr) {
if (arr.length === 0) return null;

const average = sum(arr) / arr.length;

return average;
}

// Iteration #5: Unique arrays
const wordsUnique = [
'crab',
'poison',
'contagious',
'simple',
'bring',
'sharp',
'playground',
'poison',
'communion',
'simple',
'bring'
"crab",
"poison",
"contagious",
"simple",
"bring",
"sharp",
"playground",
"poison",
"communion",
"simple",
"bring",
];

function uniquifyArray() {}
function uniquifyArray(wordsArr) {
if (wordsArr.length === 0) return null;

let uniqueArr = [];

for (let i = 0; i < wordsArr.length; i++) {
const word = wordsArr[i];

// Iteration #6: Find elements
const wordsFind = ['machine', 'subset', 'trouble', 'starting', 'matter', 'eating', 'truth', 'disobedience'];
if (!uniqueArr.includes(word)) uniqueArr.push(word);
}

function doesWordExist() {}
return uniqueArr;
}

// Iteration #6: Find elements
const wordsFind = [
"machine",
"subset",
"trouble",
"starting",
"matter",
"eating",
"truth",
"disobedience",
];

function doesWordExist(wordsArr, wordToSearch) {
if (wordsArr.length === 0) {
return null;
}

return wordsArr.includes(wordToSearch);
}

// Iteration #7: Count repetition
const wordsCount = [
'machine',
'matter',
'subset',
'trouble',
'starting',
'matter',
'eating',
'matter',
'truth',
'disobedience',
'matter'
"machine",
"matter",
"subset",
"trouble",
"starting",
"matter",
"eating",
"matter",
"truth",
"disobedience",
"matter",
];

function howManyTimes() {}
function howManyTimes(wordsArr, word) {
let count = 0;

for (let i = 0; i < wordsArr.length; i++) {
if (wordsArr[i] === word) {
count++;
}
}

return count;
}

// Iteration #8: Bonus
const matrix = [
[8, 2, 22, 97, 38, 15, 0, 40, 0, 75, 4, 5, 7, 78, 52, 12, 50, 77, 91, 8],
[49, 49, 99, 40, 17, 81, 18, 57, 60, 87, 17, 40, 98, 43, 69, 48, 4, 56, 62, 0],
[81, 49, 31, 73, 55, 79, 14, 29, 93, 71, 40, 67, 53, 88, 30, 3, 49, 13, 36, 65],
[
49, 49, 99, 40, 17, 81, 18, 57, 60, 87, 17, 40, 98, 43, 69, 48, 4, 56, 62,
0,
],
[
81, 49, 31, 73, 55, 79, 14, 29, 93, 71, 40, 67, 53, 88, 30, 3, 49, 13, 36,
65,
],
[52, 70, 95, 23, 4, 60, 11, 42, 69, 24, 68, 56, 1, 32, 56, 71, 37, 2, 36, 91],
[22, 31, 16, 71, 51, 67, 63, 89, 41, 92, 36, 54, 22, 40, 40, 28, 66, 33, 13, 80],
[24, 47, 32, 60, 99, 3, 45, 2, 44, 75, 33, 53, 78, 36, 84, 20, 35, 17, 12, 50],
[32, 98, 81, 28, 64, 23, 67, 10, 26, 38, 40, 67, 59, 54, 70, 66, 18, 38, 64, 70],
[67, 26, 20, 68, 2, 62, 12, 20, 95, 63, 94, 39, 63, 8, 40, 91, 66, 49, 94, 21],
[24, 55, 58, 5, 66, 73, 99, 26, 97, 17, 78, 78, 96, 83, 14, 88, 34, 89, 63, 72],
[
22, 31, 16, 71, 51, 67, 63, 89, 41, 92, 36, 54, 22, 40, 40, 28, 66, 33, 13,
80,
],
[
24, 47, 32, 60, 99, 3, 45, 2, 44, 75, 33, 53, 78, 36, 84, 20, 35, 17, 12,
50,
],
[
32, 98, 81, 28, 64, 23, 67, 10, 26, 38, 40, 67, 59, 54, 70, 66, 18, 38, 64,
70,
],
[
67, 26, 20, 68, 2, 62, 12, 20, 95, 63, 94, 39, 63, 8, 40, 91, 66, 49, 94,
21,
],
[
24, 55, 58, 5, 66, 73, 99, 26, 97, 17, 78, 78, 96, 83, 14, 88, 34, 89, 63,
72,
],
[21, 36, 23, 9, 75, 0, 76, 44, 20, 45, 35, 14, 0, 61, 33, 97, 34, 31, 33, 95],
[78, 17, 53, 28, 22, 75, 31, 67, 15, 94, 3, 80, 4, 62, 16, 14, 9, 53, 56, 92],
[16, 39, 5, 42, 96, 35, 31, 47, 55, 58, 88, 24, 0, 17, 54, 24, 36, 29, 85, 57],
[
16, 39, 5, 42, 96, 35, 31, 47, 55, 58, 88, 24, 0, 17, 54, 24, 36, 29, 85,
57,
],
[86, 56, 0, 48, 35, 71, 89, 7, 5, 44, 44, 37, 44, 60, 21, 58, 51, 54, 17, 58],
[19, 80, 81, 68, 5, 94, 47, 69, 28, 73, 92, 13, 86, 52, 17, 77, 4, 89, 55, 40],
[
19, 80, 81, 68, 5, 94, 47, 69, 28, 73, 92, 13, 86, 52, 17, 77, 4, 89, 55,
40,
],
[4, 52, 8, 83, 97, 35, 99, 16, 7, 97, 57, 32, 16, 26, 26, 79, 33, 27, 98, 66],
[88, 36, 68, 87, 57, 62, 20, 72, 3, 46, 33, 67, 46, 55, 12, 32, 63, 93, 53, 69],
[4, 42, 16, 73, 38, 25, 39, 11, 24, 94, 72, 18, 8, 46, 29, 32, 40, 62, 76, 36],
[20, 69, 36, 41, 72, 30, 23, 88, 34, 62, 99, 69, 82, 67, 59, 85, 74, 4, 36, 16],
[20, 73, 35, 29, 78, 31, 90, 1, 74, 31, 49, 71, 48, 86, 81, 16, 23, 57, 5, 54],
[1, 70, 54, 71, 83, 51, 54, 69, 16, 92, 33, 48, 61, 43, 52, 1, 89, 19, 67, 48]
[
88, 36, 68, 87, 57, 62, 20, 72, 3, 46, 33, 67, 46, 55, 12, 32, 63, 93, 53,
69,
],
[
4, 42, 16, 73, 38, 25, 39, 11, 24, 94, 72, 18, 8, 46, 29, 32, 40, 62, 76,
36,
],
[
20, 69, 36, 41, 72, 30, 23, 88, 34, 62, 99, 69, 82, 67, 59, 85, 74, 4, 36,
16,
],
[
20, 73, 35, 29, 78, 31, 90, 1, 74, 31, 49, 71, 48, 86, 81, 16, 23, 57, 5,
54,
],
[
1, 70, 54, 71, 83, 51, 54, 69, 16, 92, 33, 48, 61, 43, 52, 1, 89, 19, 67,
48,
],
];

function greatestProduct() {}
function greatestProduct(matrix) {
let product = 0;

const numberOfRows = matrix.length;
const numberOfColumns = matrix[0].length;

for (let i = 0; i < numberOfRows; i++) {
let row = matrix[i];

for (let e = 0; e < numberOfColumns - 3; e++) {
let rowProduct = row[e] * row[e + 1] * row[e + 2] * row[e + 3];

if (rowProduct > product) {
product = rowProduct;
}
}
}

for (let i = 0; i < numberOfColumns; i++) {
for (let e = 0; e < numberOfRows - 3; e++) {
let columnProduct =
matrix[e][i] * matrix[e + 1][i] * matrix[e + 2][i] * matrix[e + 3][i];

if (columnProduct > product) {
product = columnProduct;
}
}
}

return product;
}

// Iteration #8.2: Product of diagonals

function greatestProductOfDiagonals(matrix) {
let product = 0;

const numberOfRows = matrix.length;
const numberOfColumns = matrix[0].length;

for (let i = 0; i < numberOfRows - 3; i++) {
for (let e = 0; e < numberOfColumns - 3; e++) {
let diagonalProduct =
matrix[e][i] *
matrix[e + 1][i + 1] *
matrix[e + 2][i + 2] *
matrix[e + 3][i + 3];

if (diagonalProduct > product) {
product = diagonalProduct;
}
}
}

for (let i = 3; i < numberOfRows - 3; i++) {
for (let e = 3; e < numberOfColumns - 3; e++) {
let diagonalProduct =
matrix[e][i] *
matrix[e + 1][i - 1] *
matrix[e + 2][i - 2] *
matrix[e + 3][i - 3];

if (diagonalProduct > product) {
product = diagonalProduct;
}
}
}

return product;
}

// The following is required to make unit tests work.
/* Environment setup. Do not modify the below code. */
if (typeof module !== 'undefined') {
if (typeof module !== "undefined") {
module.exports = {
maxOfTwoNumbers,
findLongestWord,
Expand All @@ -125,6 +331,6 @@ if (typeof module !== 'undefined') {
uniquifyArray,
doesWordExist,
howManyTimes,
greatestProduct
greatestProduct,
};
}