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Articles by AmitDiwan
Page 315 of 840
How to add a tooltip to a div using JavaScript?
To add a tooltip to a div using JavaScript, first create a function that will generate the tooltip content. Next, add an event listener to the div that will call the function and display the tooltip when the div is hovered over. Finally, use CSS to style the tooltip and position it appropriately. A tooltip is a small text box that appears when a user hovers over a specific element on a webpage, such as a button, link, or image. The tooltip typically contains additional information or context about the element that the user is hovering over. Tooltips are ...
Read MoreHow to auto like all the comments on a Facebook post using JavaScript?
Important Legal and Ethical Notice: This article is for educational purposes only. Auto-liking comments may violate Facebook's Terms of Service and could result in account suspension. Always respect platform policies and user consent. To auto-like all comments on a Facebook post using JavaScript, you need to use the Facebook Graph API. This requires proper authentication, API permissions, and careful handling of rate limits. Requirements Before implementing this functionality, you must have: A Facebook App registered at Facebook for Developers Valid Access Token with required permissions (user_posts, user_likes) Permission to access the specific post and its ...
Read MoreReplace all occurrence of specific words in a sentence based on an array of words in JavaScript
We are required to write a JavaScript function that takes a string and an array of strings. Our function should return a new string, where all the occurrences of the word in the string that are present in the array are replaced by a whitespace. Our function should use the String.prototype.replace() method to solve this problem. Understanding the Problem When filtering words from a sentence, we need to: Match whole words only (not parts of words) Handle case-insensitive matching Use regular expressions ...
Read MoreConstruct objects from joining two strings JavaScript
We are required to write a JavaScript function that takes in two comma separated strings. The first string is the key string and the second string is the value string, the number of elements (commas) in both the strings will always be the same. Our function should construct an object based on the key and value strings and map the corresponding values to the keys. Example const str1= '[atty_hourly_rate], [paralegal_hourly_rate], [advanced_deposit]'; const str2 = '250, 150, 500'; const mapStrings = (str1 = '', str2 = '') => { const keys = ...
Read MoreFinding minimum deletions in string in JavaScript
When working with binary strings, we often need to ensure no two adjacent characters are the same. This requires finding the minimum number of deletions to create an alternating pattern. Problem Statement Given a binary string, we need to find the minimum deletions required so that no two adjacent characters are identical. const str = '001001'; console.log("Original string:", str); Original string: 001001 For the string '001001', we need 2 deletions to get '0101' (removing characters at indices 0 and 3). Solution Approach The algorithm iterates through the string and ...
Read MoreFinding Sum of Left Leaves of a BST in JavaScript
We are required to write a JavaScript function that takes in the root of a Binary Search Tree as the only argument. The function should simply calculate the sum of data stored in the left leaves of the BST. Problem Example For example, if the Tree looks like this: 8 / \ 1 10 / \ 5 17 Then the output should be: 6 Output Explanation Because there are two left leaves in the ...
Read MoreFinding number of open water taps after n chances using JavaScript
Problem Suppose a school organises this game on their Annual Day celebration − There are "n" water taps and "n" students are chosen at random. The instructor asks the first student to go to every tap and open it. Then he has the second student go to every second tap and close it. The third goes to every third tap and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth tap, and so on. After the process is completed with the "n"th student, how many taps ...
Read MoreHow to avoid dropdown menu to close menu items on clicking inside?
We can use the preventDefault() method to prevent the default behavior of the click event on the dropdown menu. By doing this, the menu items will not close when clicked inside. Additionally, we can add a click event listener to the dropdown menu and set the event.stopPropagation() method to stop the event from propagating to parent elements. HTML Dropdown HTML dropdown is a type of form element that allows users to select one option from a list of options. It is created using the select and option tags in HTML. The "select" tag defines the dropdown container and ...
Read MoreHow to get all combinations of some arrays in JavaScript?
Getting all combinations of arrays in JavaScript can be accomplished using recursive generator functions or iterative approaches. This is useful for creating permutations, product combinations, and other algorithmic solutions. Using Generator Function (Cartesian Product) A generator function can efficiently create all combinations by recursively building each possibility: function getAllCombinations(values) { function* generateCombinations(size, current) { if (size) { for (var element of values) { ...
Read MoreBest way to flatten an object with array properties into one array JavaScript
When you have an object containing arrays as values, you often need to flatten all these arrays into a single array. This is a common operation when working with grouped data. const obj = { arr_a: [9, 3, 2], arr_b: [1, 5, 0], arr_c: [7, 18] }; console.log("Original object:", obj); Original object: { arr_a: [ 9, 3, 2 ], arr_b: [ 1, 5, 0 ], arr_c: [ 7, 18 ] } The goal is to merge all array values into one ...
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