Javascript Articles - Page 150 of 534

ProblemWe are required to write a JavaScript function that takes in an array of numbers. Our function should try and remove the least number of elements from the array so that the array becomes an increasing sequence.ExampleFollowing is the code − Live Democonst arr = [1, 100, 2, 3, 100, 4, 5]; const findIncreasingArray = (arr = []) => {    const copy = arr.slice();    for(let i = 0; i < copy.length; i++){       const el = arr[i];       const next = arr[i + 1];       if(el > next){          copy[i] = undefined;       };    };    return copy.filter(Boolean); }; console.log(findIncreasingArray(arr));Output[ 1, 2, 3, 4, 5 ]

ProblemWe are required to write a JavaScript function that takes in a number n. Starting with ‘1’ our function should construct a string of length n that contains ‘1’ and ‘0’ alternatingly.ExampleFollowing is the code − Live Democonst num = 12; const buildString = (num = 1) => {    let res = '';    for(let i = 0; i < num; i++){       if(i % 2 === 0){          res += 1;       }else{          res += 0;       };    };    return res; }; console.log(buildString(num));Output101010101010

ProblemWe are required to write a JavaScript function that takes in an array of numbers.Our function should construct and return a new array that contains all the numbers of the input array that are not odd.ExampleFollowing is the code − Live Democonst arr = [5, 32, 67, 23, 55, 44, 23, 12]; const findNonOdd = (arr = []) => {    const res = [];    for(let i = 0; i < arr.length; i++){       const el = arr[i];       if(el % 2 !== 1){          res.push(el);          continue;       };    };    return res; }; console.log(findNonOdd(arr));Output[ 32, 44, 12 ]

ProblemWe are required to write a JavaScript function that takes in a string number of at least five digits. Our function should return the greatest sequence of five consecutive digits found within the number given.ExampleFollowing is the code − Live Democonst num = '123546544'; const findGreatestFiveDigit = (num = '') => {    const str = num.toString();    const arr = [];    for(let i = 0; i < str.length; i++){       arr.push(str.slice(i, i + 5));    };    return Math.max(...arr); }; console.log(findGreatestFiveDigit(num));Output54654

ProblemWe are required to write a JavaScript function that takes in an array of words and punctuations. Our function should join array elements to construct a sentence based on the following rules −there must always be a space between words;there must not be a space between a comma and word on the left;there must always be one and only one period at the end of a sentence.ExampleFollowing is the code − Live Democonst arr = ['hey', ', ', 'and', ', ', 'you']; const buildSentence = (arr = []) => {    let res = '';    for(let i = 0; i ... Read More

ProblemWe are required to write a JavaScript function that takes in a number n(n>0). Our function should return an array that contains the continuous parts of odd or even digits. It means that we should split the number at positions when we encounter different numbers (odd for even, even for odd).ExampleFollowing is the code − Live Democonst num = 124579; const splitDifferent = (num = 1) => {    const str = String(num);    const res = [];    let temp = '';    for(let i = 0; i < str.length; i++){       const el = str[i];     ... Read More

ProblemWe are required to write a JavaScript function that takes in a decimal number, converts it into binary and reverses its 1 bit to 0 and 0 to 1 and returns the decimal equivalent of new binary thus formed.ExampleFollowing is the code − Live Democonst num = 45657; const reverseBitsAndConvert = (num = 1) => {    const binary = num.toString(2);    let newBinary = '';    for(let i = 0; i < binary.length; i++){       const bit = binary[i];       newBinary += bit === '1' ? '0' : 1;    };    const decimal = parseInt(newBinary, 2);    return decimal; }; console.log(reverseBitsAndConvert(num));Output19878

ProblemWe are required to write a JavaScript function that takes in a number n and returns the sum of all perfect cube numbers smaller than or equal to n.ExampleFollowing is the code − Live Democonst num = 23546; const sumPerfectCubes = (num = 1) => {    let i = 1;    let sum = 0;    while(i * i * i

Increasing TriangleFor the purpose of this problem, suppose an increasing triangle to be like this −   1   2 3  4 5 6 7 8 9 10ProblemWe are required to write a JavaScript function that takes in a number n and returns the sum of numbers present in the nth row of increasing triangle.ExampleFollowing is the code − Live Democonst num = 15; const rowSum = (num = 1) => {    const arr = [];    const fillarray = () => {       let num = 0;       for(let i = 1; i a + b, 0); }; console.log(rowSum(num));Output1695

In the realm of computational geometry, the ability to accurately calculate the area of a triangle based on its three sides is of paramount importance. JavaScript, a versatile programming language, offers developers the means to perform this complex mathematical task with precision. While the process may seem daunting at first, mastering the art of calculating the area of a triangle using its three sides in JavaScript is a testament to a developer's prowess in numerical algorithms and mathematical manipulation. In this enlightening article, we will embark on a journey through the intricacies of computational geometry, exploring a step-by-step approach to ... Read More