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ProblemWe are required to write a JavaScript function that takes in a number n and return an array containing first n natural number.The only condition is that the numbers should be sorted lexicographically which means all the numbers starting with 1 should come before any starting with 2 or 3 or 4 and so on.ExampleFollowing is the code − Live Democonst num = 24; const buildLexicographically = (num = 1) => { const res = []; const curr = num >= 9 ? 9 : num; for (let i = 1; i
ProblemWe are required to write a JavaScript function that takes in a string that represents a sentence.Our function should reverse the order of words present in the string and return the new string.It means that the last word should become the first, second last should be the second and so on.ExampleFollowing is the code − Live Democonst str = 'this is some random string text'; const reverseWords = (str = '') => { const strArr = str.split(' '); strArr.reverse(); const reversedStr = strArr.join(' '); return reversedStr; }; console.log(reverseWords(str));OutputFollowing is the console output −text string random some is ... Read More
ProblemWe are required to write a JavaScript function that takes in an array that specifies a range.Our function should find and return the sum of all the natural numbers falling in the range including the range numbers.ExampleFollowing is the code − Live Democonst range = [4, 67]; const findSum = ([l, h]) => { let sum = 0; for(let i = l; i
ProblemThe car registering system of a city N assigns two types of numbers −The Customer ID − a natural number between 0 and 17558423 inclusively, which is assigned to the car buyers in the following order: the first customer receives ID 0, the second customer receives ID 1, the third customer receives ID 2, and so on;Number Plate − assigned to the car and contains the series ( three Latin lowercase letters from a to z) and the serial number (three digits from 0 to 9).Example − aaa001. Each Number Plate is related to the given Customer ID. For example: ... Read More
ProblemWe are required to write a JavaScript function that takes in a string and converts it into NATO phonetic alphabet.The 26 code words are as follows: Alfa, Bravo, Charlie, Delta, Echo, Foxtrot, Golf, Hotel, India, Juliett, Kilo, Lima, Mike, November, Oscar, Papa, Quebec, Romeo, Sierra, Tango, Uniform, Victor, Whiskey, X-ray, Yankee, Zulu.ExampleFollowing is the code − Live Democonst str = 'this is simple string'; const convertToNato = (str = '') => { let nato = { a: 'Alfa', b: 'Bravo', c: 'Charlie', d: 'Delta', e: ... Read More
ProblemWe are required to write a JavaScript function that takes in a number in miles/gallon and return its equivalent km/litre.ExampleFollowing is the code − Live Democonst num = 25; const converter = (mpg) => { let LITRES_PER_GALLON = 4.54609188; let KILOMETERS_PER_MILE = 1.609344; const ratio = KILOMETERS_PER_MILE / LITRES_PER_GALLON; return Math.round(100 * mpg * ratio) / 100; }; console.log(converter(num));OutputFollowing is the console output −8.85
Triangular NumberTriangular number is the number of points that can fill an equilateral triangle.For instance − 9 is a triangular number which makes an equilateral triangle with each side of 4 units.ProblemWe are required to write a JavaScript function that takes in a number and returns true if its a triangular number, false otherwise.ExampleFollowing is the code − Live Democonst num = 9; const isTriangular = (num = 1) => { let i = 4; if(num === 1){ return true; }; if(num === 3){ return true; }; while(((3 * 1) - 3)
ProblemWe are required to write a JavaScript function that takes in the 1-based month index and return the quarter, which the month falls in.ExampleFollowing is the code − Live Democonst month = 7; const findQuarter = (month = 1) => { if (month
ProblemWe are required to write a JavaScript function that takes in a number n and converts it to the corresponding string without using the inbuilt functions String() or toString() or using string concatenation.ExampleFollowing is the code − Live Democonst num = 235456; const convertToString = (num) => { let res = ''; while(num){ res = (num % 10) + res; num = Math.floor(num / 10); }; return res; }; console.log(convertToString(num));OutputFollowing is the console output −235456
Doubleton NumberWe will call a natural number a "doubleton number" if it contains exactly two distinct digits. For example, 23, 35, 100, 12121 are doubleton numbers, and 123 and 9980 are not.ProblemWe are required to write a JavaScript function that takes in a number and return true if it is a doubleton number, false otherwise.ExampleFollowing is the code − Live Democonst num = 121212; const isDoubleTon = (num = 1) => { const str = String(num); const map = {}; for(let i = 0; i < str.length; i++){ const el = str[i]; ... Read More