In the given problem statement we are asked to manipulate objects in an array of objects with the help of javascript functionalities. In Javascript we have some built−in functions called map(), reduce(), forEach() and filter() to manipulate the objects in an array. We can solve this problem with the help of these functions. What is the manipulating object in an array ? Let's understand the manipulation of objects in an array. Manipulation means updating an array object, deleting an array object or adding an object in an array. In Javascript, there are several methods present to do these kinds of ... Read More

In the given problem statement we are asked to truncate a string with the help of javascript functionalities. We can solve this problem with the help of Javascript’s built−in functions slice() and substr(). What do you mean by truncating a string ? Let's understand the meaning of truncating a string. Truncating a string means cutting the length of a string by removing character from the beginning, end or middle part of the input string. The aim of truncating a string is to make a certain space or to make it more readable by truncating unnecessary information from the input ... Read More

In the given problem statement we are asked to implement a function to decode a string with the help of javascript functionalities. To solve these kinds of problems we can use built−in functions of Javascript. These functions usually take encoded data as input and give output as decoded strings. What are built−in methods to decode strings in Javascript? Let's understand techniques to decode strings in javascript. In javascript, if we need to decode a string we can use different built−in methods. Some methods are: decodeURIComponent(), unescape() and atob(). We will see the working of all the methods in detail below. ... Read More

In the given problem statement we are asked to implement backtracking for a climbing stairs practice with the help of javascript functionalities. In the data structures backtracking is popularly known to explore all the possible solutions. We can solve this problem with the help of a backtracking algorithm. What is the Backtracking Technique ? Let's understand the working of a Backtracking technique. Backtracking is a well known algorithm technique, which is basically used to solve the problem statements that include searching for all possible solutions. It is based on a depth−first strategy and it is used in combination with a ... Read More

In the given problem statement we are asked to find all the possible combinations from an array with the help of javascript functionalities. So for this we will be working with an empty array and add all the possible combinations into this array. Logic for The Above Problem The easiest way to find the possible combinations from an array in javascript is by using a for loop add the combination to the created new array.. To understand the logic for this implementation we will work by iterating through the input array and for each element we will create a ... Read More

In the given problem statement we are asked to create a fibonacci like sequence with the help of javascript functionalities. In the Javascript we can solve this problem with the help of recursion or using a for loop. What is the Fibonacci Sequence ? Let's understand the working of a Fibonacci sequence in JavaScript. As we know that Fibonacci sequence is a sequence of numbers in which every number is the sum of the two forgoing numbers. The series starts from 0 and 1. The next number in the series is 1 (0 + 1), followed by 2 (1 ... Read More

In the given problem statement we are asked to calculate the difference between the first and second element of each subarray separately and we have to return the sum of their differences with the help of javascript functionalities. In the array data structures we can define an array which can also contain subarrays. What is an Array of Subarrays in JavaScript ? Let's understand the working of a list in JavaScript. In javascript we can define array of subarray or nested array. An array of subarrays is an array which contains one or more arrays as its elements. Every array ... Read More

In the given problem statement we are asked to calculate the average for each subarray separately and then return the sum of all the averages with the help of javascript functionalities. As we talk about average for subarrays we can use the reduce method of javascript. What is the reduce() Method in JavaScript ? Let's understand the working of a reduce function in JavaScript. In javascript the reduce method is used to reduce an array to a single value by iterating over each and every item of the array. And by applying the callback function that accumulates a value based ... Read More

In the given problem statement we are asked to sort an array including the elements present in the subarrays with the help of javascript functionalities. As we talk about sorting any list or array the sort() and flat method is useful. What are sort(), flat() and isArray() methods in JavaScript ? Let's understand the working of sort, flat and isArray methods in JavaScript. The sort() method is basically used to sort the elements of an array and returns the sorted array. The items are sorted in dictionary order by default. But we can provide a function as an argument to ... Read More

In the given problem statement we are asked to group the JSON object with the help of javascript functionalities. This problem can be solved with the help of a simple algorithm in javascript. What is JSON ? JSON (Javascript Object Notation) is lightweight data which can be transferred between two devices. This data can be read and written by humans. JSON objects are represented in the form of key−value pairs. Keys are strings to define values. In JSON each entry is separated by a semicolon. For example − {“Car” : “Audi”}, in this example Car is a key and Audi ... Read More