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Articles by AmitDiwan
Page 379 of 840
Finding next greater node for each node in JavaScript
We are required to write a JavaScript function that takes in the head of a linked list as the first and only argument. This linked list contains numerical data. Each node in the list may have a next larger value: for node_i, next_larger(node_i) is the node_j.val such that j > i, node_j.val > node_i.val, and j is the smallest possible choice. If such a j does not exist, the next larger value is 0. Our function should prepare and return an array in which the corresponding element is the next greater element for the element in the list. ...
Read MoreChecking for vowels in array of numbers using JavaScript
We are required to write a JavaScript function that takes in an array of numbers. If in that array there exists any number which is the char code of any vowel in ASCII, we should switch that number to the corresponding vowel and return the new array. Understanding ASCII Character Codes In ASCII, vowels have specific character codes: 'a' = 97 'e' = 101 'i' = 105 'o' = 111 'u' = 117 Example Let's create a function that converts ASCII codes to vowels when they match: const arr = [5, 23, ...
Read MoreHow do I console.log JavaScript variables as it relates to DOM?
To display variables on console when working with the DOM, you can use console.log() to output element objects, their properties, or values. The document.getElementById() method retrieves DOM elements which can then be logged to examine their properties. Logging DOM Elements When you log a DOM element directly, the browser console displays the element object with all its properties: Console Log DOM Example Hello World ...
Read MoreASCII sum difference of strings in JavaScript
ASCII (American Standard Code for Information Interchange) is a 7-bit character encoding standard where every character has a unique decimal code. We can calculate the ASCII sum of strings and find their difference in JavaScript. Understanding ASCII Codes Each character has a specific ASCII value. For example, 'A' = 65, 'a' = 97, '0' = 48, and space = 32. We can get these values using JavaScript's charCodeAt() method. Getting ASCII Values console.log('A'.charCodeAt(0)); // 65 console.log('a'.charCodeAt(0)); // 97 console.log('0'.charCodeAt(0)); // 48 console.log(' '.charCodeAt(0)); ...
Read MoreWhat's the most efficient way to turn all the keys of an object to lower case - JavaScript?
When working with JavaScript objects, you may need to convert all property keys to lowercase for consistency. Here's how to efficiently transform object keys using built-in JavaScript methods. Sample Object Let's start with an object that has uppercase keys: var details = { "STUDENTNAME": "John", "STUDENTAGE": 21, "STUDENTCOUNTRYNAME": "US" }; console.log("Original object:", details); Original object: { STUDENTNAME: 'John', STUDENTAGE: 21, STUDENTCOUNTRYNAME: 'US' } Method 1: Using Object.keys() and while Loop This approach uses a while loop to iterate ...
Read MoreExpressive words problem case in JavaScript
Sometimes people repeat letters to represent extra feeling, such as "hello" → "heeellooo", "hi" → "hiiii". In these strings like "heeellooo", we have groups of adjacent letters that are all the same: "h", "eee", "ll", "ooo". For some given string S, a query word is stretchy if it can be made to be equal to S by any number of applications of the following extension operation: choose a group consisting of characters c, and add some number of characters c to the group so that the size of the group is 3 or more. For example, starting with ...
Read MoreFinding the smallest positive integer not present in an array in JavaScript
We are required to write a JavaScript function that takes in array of integers as the first and the only argument. Our function should find and return that smallest positive integer which is not present in the array. For example, if the input array is: const arr = [4, 2, -1, 0, 3, 9, 1, -5]; Then the output should be: 5 Because 1, 2, 3, 4 are already present in the array and 5 is the smallest positive integer absent from the array. Using Sequential Search Approach ...
Read MoreGreatest sum and smallest index difference in JavaScript
This problem asks us to find the maximum value of the expression (arr[i] + arr[j]) + (i - j) for any pair of indices in an array. Let's break down the solution step by step. Problem Statement Given an array of integers, we need to find an index pair (i, j) such that (arr[i] + arr[j]) + (i - j) is maximized. The function should return this maximum value. Understanding the Formula The expression (arr[i] + arr[j]) + (i - j) can be rearranged as: (arr[i] + i) + (arr[j] - j) ...
Read MoreChecking if all array values are smaller than a limit using JavaScript
Problem We are required to write a JavaScript function that takes in an array of numbers and a number. We should return true if all the numbers in the array are smaller than the number given as second argument, false otherwise. Using Array.every() Method The Array.every() method tests whether all elements in the array pass the test implemented by the provided function. It returns true if all elements satisfy the condition, false otherwise. Example 1: All Values Smaller Following is the code − const arr = [5, 34, 23, 14, 78, 45, 78]; const limit = ...
Read MoreJavaScript: lexical scoping issue using new keyword constructor while adding inner function?
When using constructor functions with inner functions, a common lexical scoping issue arises where the inner function cannot access the constructor's this context. This happens because inner functions have their own execution context. The Problem Inner functions don't inherit the this binding from their parent constructor, leading to undefined or incorrect values when trying to access constructor properties. function Employee() { this.technologyName = "JavaScript"; function workingTechnology() { // 'this' here refers to global object, not ...
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