Suppose, we have an array of objects like this −const arr = [{ 'title': 'Hey',    'foo': 2,    'bar': 3 }, {    'title': 'Sup',    'foo': 3,    'bar': 4 }, {    'title': 'Remove',    'foo': 3,    'bar': 4 }];We are required to write a JavaScript function that takes in one such array as the first input and an array of string literals as the second input.Our function should then prepare a new array that contains all those objects whose title property is partially or fully included in the second input array of literals.ExampleThe code for ... Read More

Suppose, we have an array string that contains some duplicate entries like this −const arr = ['California', 'Texas', 'Texas', 'Texas', 'New York', 'Missouri', 'New Mexico', 'California'];We are required to write a JavaScript function that takes in one such array. Our function should then construct an array of objects that contains an object for each unique entry and a property "count" that contains its count in the original array.Therefore, the final output for the above array should look something like this −const output = [    {'name':'California', 'count':2},    {'name':'Texas', 'count':3},    {'name':'New York', 'count':1},    {'name':'Missouri', 'count':1},    {'name':'New Mexico', ... Read More

Suppose, we have one array of strings and another array of objects like this −const arr1 = [ '1956888670', '2109171907', '298845084' ]; const arr2 = [    { KEY: '1262875245', VALUE: 'Vijay Kumar Verma' },    { KEY: '1956888670', VALUE: 'Sivakesava Nallam' },    { KEY: '2109171907', VALUE: 'udm analyst' },    { KEY: '298845084', VALUE: 'Mukesh Nagora' },    { KEY: '2007285563', VALUE: 'Yang Liu' },    { KEY: '1976156380', VALUE: 'Imtiaz Zafar' }, ];We are required to write a JavaScript function that takes in two such arrays. Then our function should return a filtered version of the second ... Read More

Suppose we have a short JSON object like this −const obj = {"name":"sam", "age":"24", "isMarried":"false"};Here, some of the Number and Boolean values, by mistake, have been coerced to String.Like the age property which was a Number and isMarried property which was a boolean. Our job is to write a function that takes in one such object and correctly changes these incorrect data types with the correct ones.ExampleThe code for this will be −const obj = {    "name":"sam",    "age":"24",    "isMarried":"false" }; const convertToOriginal = (obj = {}) => {    const keys = Object.keys(obj);    for(let i = ... Read More

In the given problem statement we have to group the given data month wise. In simple terms the data should be in sorted form after grouping them month wise. For example we have years and months given in data so it should be visible in the order from January to December. As we know that Arrays are the data structures template to store data. And we can manipulate that data as per our requirement. It can store a collection of items in a single array, and has many operations to perform like adding an element, deleting an element, ... Read More

In the given problem statement we are asked to convert numbers to characters with the help of javascript functionalities. In Javascript we have some built−in functions to convert a number to its corresponding characters and also with user defined functions we can convert it. Logic for The Above Problem As we know that every programming language defines its own function to perform certain operations. So Javascript has a built−in method to convert a number into its corresponding character. These function names are 'fromCharCode' and 'charCodeAt'. With these functions we need to pass the input number and it will convert and ... Read More

In the given problem statement we are asked to get value for key from nested JSON object with the help of javascript functionalities. In Javascript we can solve and access the json data object with the help of dot notation or bracket notation. Before starting coding for the given problem, let's understand what exactly is the JSON object: What is JSON and nested JSON objects? JSON’s full form is Javascript Object Notation. It is a standard text based format to show the structured data. It is basically used to transmit data in web applications, which means we can send ... Read More

In the above statement we are asked to check if items in an array are consecutive without sorting the array with the help of javascript functionalities. We can solve this problem with some basic functionalities of javascript. Let us see how to do this! What are Consecutive Items in an Array ? Consecutive elements means every next item should be greater or smaller to the previous element in the sequence. For example we have an array [1, 2, 3, 4, 5], So here we can see that the array contains all the consecutive items as they are in increasing ... Read More

In the given problem statement we are required to map an array to a new array with default values with the help of javascript functionalities. In Javascript we have some built−in function to map an array to a new array as per the condition and requirement. What is an array in Javascript ? An array is a collection of similar data elements under one roof. So let's understand the overall working process of arrays in JavaScript. An array is an object that contains one or more elements. Example const arr = ['A', 'B', 'C', 'D']; console.log(arr); Output [ ... Read More

In the given problem statement we are required to convert an object to an array of objects with the help of javascript functionalities. To perform conversion of an object into an array of objects we can use Javascript’s built−in methods. What is an Array in Javascript ? An array is a collection of similar data elements under one roof. So let's understand the overall working process of arrays in JavaScript. An array is an object that contains one or more elements. So it has some properties and methods that make working with arrays easier in JavaScript. For example const ... Read More