Suppose, we have the following array of objects −const arr = [    {       "date" : "2010-01-01",       "price" : 30    },    {       "date" : "2010-02-01",       "price" : 40    },    {       "date" ... Read More

Suppose, we have an array of objects like this −const arr = [{    "value": 10,    "id": "111",    "name": "BlackCat", }, {    "value": 10,    "id": "111",    "name":    "BlackCat", }, {    "value": 15,    "id": "777",    "name": "WhiteCat", }];We are required to write ... Read More

We are required to write a JavaScript function that takes in two strings, say str1 and str2. We are required to determine whether or not the second string is a rotated version of the first string.For example− If the input strings are −const str1 = 'abcde'; const str2 = 'cdeab';Then ... Read More

We are required to write a JavaScript function that takes in a sorted array of numbers as the first argument and a search number as the second argument.If the search number exists in the array, we need to return its index in the array, otherwise we need to return -1.We ... Read More

We are required to write a JavaScript function that takes in a string that might contain spaces. Our function should first split the string based on the spaces and then reverse and join and return the new string.For example − If the input string is −const str = 'this is ... Read More

For the purpose of this very problem, we define the correct use of uppercase letter by the following rules −All letters in a word are capitals, like "INDIA".All letters in a word are not capitals, like "example".Only the first letter in a word is capital, like "Ramesh".We are required to ... Read More

We are required to write a JavaScript function that takes in an array. The array might contain any type of value, Number literals, string literals, objects, undefined.Our function should pick all the Number type values and return their sumExampleconst arr = [1, 2, 'a', 4]; const countNumbers = (arr = ... Read More

Suppose, we have the following array of arrays −const arr = [ ["A", "F", "A", "H", "F", "F"],  ["F", "A", "A", "F", "F", "H"] ];We are required to write a JavaScript function that takes in one such array.The function should sort all the subarrays of the given array internally according ... Read More

A perfect number is a positive integer that is equal to the sum of its positive divisors, excluding the number itself. A divisor of an integer x is an integer that can divide x evenly.For example −28 is a perfect number, because 28 = 1 + 2 + 4 + ... Read More

We are required to write a JavaScript function that takes in an array of numbers as the first argument and a single number as the second argument.Our function should check for all the instances of second number in the array, if there exists any, the function should push all those ... Read More