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We have an array of Numbers that are arranged in pure random order. Our job is to write a function that takes in one such array of Numbers and returns the difference of greatest and smallest numbers present in it, but without sorting the array.Therefore, let's write the code for this function −We will use the Array.prototype.reduce() function to pick the smallest and greatest numbers from the array and later will return their difference. The code for this function will be −Exampleconst arr = [23, 65, 67, 23, 2, 6, 87, 23, 45, 65, 3, 234, 3]; const findDifference = ... Read More
We have an array of Number/String literals that contains some repeated entries. Our job is to write a function that takes in a positive integer Number n and returns a subarray of all the elements that makes appearance more than or equal to the number n specified by the only argument.Therefore, let's write the code for this function −We will use a Map() to keep count of the frequency of elements and later return the elements that exceed the specified count. The code for this will be −Exampleconst arr = [34, 6, 34, 8, 54, 7, 87, 23, 34, 6, ... Read More
Suppose we have an object like this −const obj = { "name": "Vivek Sharma", "occupation": "Software Engineer", "age": 23, "contacts": [{ "name": "Mukul Sharma", "occupation": "Software Engineer", "age": 31, }, { "name": "Jay Sharma", "occupation": "Software Engineer", "age": 27, }, { "name": "Rajan Sharma", "occupation": "Software Engineer", "age": 32, }] };Here it is nested up to only one level, but the nesting can be deeper as ... Read More
Suppose we have an array of numbers like this −const arr = [3, 6, 7, 3, 1, 4, 4, 3, 6, 7];This array in the example contains 10 elements, so the index of last element happens to be 9. We are required to write a function that takes in one such array and returns the reverse index multiplied sum of the elements.Like in this example, it would be something like −(9*3)+(8*6)+(7*7)+(6*3)+.... until the end of the array.Therefore, let's write the code for this function −Exampleconst arr = [3, 6, 7, 3, 1, 4, 4, 3, 6, 7]; const reverseMultiSum = ... Read More
Normally, the factorial of a positive integer n is the product of all positive integers less than or equal to n. For example, factorial(10) = 10 * 9 * 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1.We instead make a clumsy factorial: using the integers in decreasing order, we swap out the multiply operations for a fixed rotation of operations: multiply (*), divide (/), add (+) and subtract (-) in this order.For example, clumsy(10) = 10 * 9 / 8 + 7 - 6 * 5 / 4 + 3 - 2 * ... Read More
We have to write a function maximumDifference() that takes in a positive number n and returns the difference between the maximum number and the minimum number that can be formed out of the number n.For example −If the number n is 203, The maximum number that can be formed from its digits will be 320The minimum number that can be formed from its digits will be 23 (placing the zero at one’s place)And the difference will be −320-23 = 297Therefore, the output should be 297Let's write the code for this function −Exampleconst digitDifference = num => { const asc ... Read More
We are required to write a function that takes in a string of definite characters and the function should return the difference between the count of vowels plus other characters and consonants in the string.For example −If the string is −"HEllo World!!"Then, we have 7 consonants, 3 vowels and 3 other characters here so the output should be −|7 - (3+3)| = 1Hence, the output should be 1Let's write the code for this function −Exampleconst str = 'HEllo World!!'; const findDifference = str => { const creds = str.split("").reduce((acc, val) => { let { v, c ... Read More
We are required to write a function, say nearestPalindrome() that takes in a number n and returns a palindromic number that is nearest to the number n.For example −If the input number is 264, then the output should be 262If the input number is 7834, then the output should be 7887Basically, the approach will be, we divide the number into two halves (w.r.t. its length) and return the new number which is just the first half concatenated twice.Exampleconst findNearestPalindrome = num => { const strNum = String(num); const half = strNum.substring(0, Math.floor(strNum.length/2)); const reversed = half.split("").reverse().join(""); ... Read More
We are given two integers m and n. The goal is to count m digit numbers that are divisible by n.If m=1, then numbers are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 and n=3 then numbers divisible by 3=0, 3, 6, 9 count=4.Let’s understand with examples.Input − m=2, n=9Output − Count of m digit numbers divisible by n − 10Explanation − between 10 and 99 numbers divisible by 9 are −18, 27, 36, 45, 54, 63, 72, 81, 90, 99Input m=3, n=300Output − Count of m digit numbers divisible by n: 3Explanation − between 100 and 999 ... Read More
We are given an array of n positive numbers.The goal is to count the ordered pairs (i,j) such that arr[i]*arr[j] > arr[i]+arr[j] and 0sum.Traverse array using two for loops for each element of the pair.Outer Loop from 0