Suppose, we have an array of numbers like this −const arr = [1, 5, 2, 1, 2, 3, 4, 5, 7, 8, 7, 1];We are required to write a JavaScript function that takes in one such array and counts the sum of all distinct elements of the array.For example:The output ... Read More

We are required to write a JavaScript function that takes in a number and checks whether it falls in Fibonacci series or not.We should return a boolean on this basis.ExampleThe code for this will be −const num = 89; const isFib = query => {    if(query === 0 || ... Read More

Suppose we have a sorted array of literals like this −const arr = [2, 2, 3, 3, 3, 5, 5, 6, 7, 8, 9];We are required to write a JavaScript function that takes in one such array and returns the first number that appears only once in the array.If there ... Read More

We are required to write a JavaScript function that takes in a Number, say n, and we are required to check whether there exist such three consecutive natural numbers (not decimal/floating point) whose sum equals to n.If there exist such numbers, our function should return them, otherwise it should return ... Read More

We are required to write a JavaScript function that takes in a lowercase string and sorts it in the reverse order i.e., b should come before a, c before b and so on.For example:If the input string is −const str = "hello";Then the output should be −const output = "ollhe";The ... Read More

We have an array of numbers like this −const arr = [1, 1, 5, 2, -4, 6, 10];We are required to write a function that returns a new array, of the same size but with each element being the sum of all elements until that point.Therefore, the output should look ... Read More

We are required to create a function that takes in a number and finds the sum of its digits recursively until the sum is a one-digit number.For examplefindSum(12345) = 1+2+3+4+5 = 15 = 1+5 = 6Therefore, the output should be 6.Let’s write the code for this function findSum()// using recursion ... Read More

We are required to write a JavaScript function that takes in an array of literals. Our function should return a new array with all the triplets filtered.The code for this will be −const arr1 = [1, 1, 1, 3, 3, 5]; const arr2 = [1, 1, 1, 1, 3, 3, ... Read More

We have a parentArray that contains many sub arrays each of the same size, each sub array is an array of objects containing two properties: key and value. Within a subarray it is confirmed that two objects cannot have the same key but all subarrays have the same pair of ... Read More

We have an object with other objects being its property value, it is nested to 2-3 levels or even more.Here is the sample object −const people = {    Ram: {       fullName: 'Ram Kumar',       details: {          age: 31,     ... Read More