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Articles by AmitDiwan
Page 453 of 840
Is there an elegant way of passing an object of parameters into a function?
Passing an object of parameters to a function provides flexibility and improves code readability. This technique allows you to avoid positional parameters and makes your functions more maintainable. Using Object Destructuring (Recommended) The most elegant approach uses ES6 destructuring to extract object properties directly in the function parameter: Object Parameters Example Passing Object Parameters to Functions Calculate Sum ...
Read MoreRemove and add new HTML Tags with JavaScript?
JavaScript provides several methods to dynamically remove and add HTML elements to the DOM. You can hide/show existing elements or completely remove/create new elements using vanilla JavaScript or jQuery. Method 1: Using jQuery hide() and show() The simplest approach is using jQuery's hide() and show() methods to toggle element visibility: Hide/Show Elements Test JavaScript This content can be hidden and shown. ...
Read MoreCheck for illegal number with isNaN() in JavaScript
In JavaScript, isNaN() function checks if a value is "Not a Number" (NaN). It's commonly used to validate numeric operations and detect illegal numbers in calculations. What is NaN? NaN stands for "Not a Number" and is returned when a mathematical operation fails or produces an undefined result, such as multiplying a string with a number. Syntax isNaN(value) Parameters value: The value to be tested. If not a number, JavaScript attempts to convert it before testing. Return Value Returns true if the value is NaN, false otherwise. Example: Detecting ...
Read MoreFinding mistakes in a string - JavaScript
We are required to write a JavaScript function that takes in two strings. The first string is some mistyped string and the second string is the correct version of this string. We can assume that the two strings we are getting as argument will always have the same length. We have to return the number of mistakes that exist in the first string by comparing it character by character with the correct version. Approach The solution involves iterating through both strings simultaneously and comparing each character at the same position. When characters don't match, we increment our ...
Read MoreThrice sum of elements of array - JavaScript
We are required to write a JavaScript function that takes in an array of Numbers and returns a new array with elements as sum of three consecutive elements from the original array. For example, if the input array is: const arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] Then the output should be: const output = [3, 12, 21, 9]; The function groups elements in sets of three and calculates their sum: (0+1+2=3), (3+4+5=12), (6+7+8=21), and (9+0+0=9) for the remaining element. How It Works The ...
Read MoreLocation protocol Property in JavaScript
The location.protocol property in JavaScript returns the protocol scheme of the current webpage's URL, including the colon (:). It's a read-only property that helps identify whether a page is served over HTTP, HTTPS, or other protocols. Syntax location.protocol Return Value Returns a string representing the protocol scheme, including the trailing colon. For example: "https:", "http:", "file:", etc. Common Protocol Values http: − Hypertext Transfer Protocol (unsecured) https: − Hypertext Transfer Protocol Secure (secured with SSL/TLS) file: − Local file system access ...
Read MoreIs it possible to de-structure to already-declared variables? In JavaScript?
Yes, it is possible to destructure to already-declared variables in JavaScript. However, you must wrap the destructuring assignment in parentheses to avoid syntax errors. The Problem When variables are already declared, JavaScript cannot distinguish between a block statement and destructuring assignment: Destructuring Problem let name, age; ...
Read MoreHow can I instantiate a dictionary in JavaScript where all keys map to the same value?
In JavaScript, you can create a dictionary (object) where all keys map to the same value using several approaches. This is useful when you need to initialize multiple properties with identical values. Method 1: Using a for...of Loop The most straightforward approach is to iterate through an array of keys and assign the same value to each: const keys = ['Name1', 'Name2', 'Name3']; const dictionary = {}; for (const key of keys) { dictionary[key] = 'John'; } console.log(dictionary); { Name1: 'John', Name2: 'John', Name3: 'John' } ...
Read MoreFrequency distribution of elements - JavaScript
We are required to write a JavaScript function that takes a string and returns an object representing the frequency distribution of each character in the string. const str = 'This string will be used to calculate frequency distribution'; We need to return an object that represents the frequency distribution of various characters present in the string. Example Following is the code: const str = 'This string will be used to calculate frequency distribution'; const frequencyDistribution = str => { const map = {}; ...
Read MoreFinding the rotation of an array in JavaScript
We are required to write a JavaScript function that takes in an array and a number n. Our function should rotate the array by n elements, i.e., take n elements from the front and put them to the end. The only condition here is that we have to do this without using any extra space in memory. For example, if the input array is: const arr = [12, 6, 43, 5, 7, 2, 5]; and number n is 3, then the output should be: const output = [5, 7, 2, 5, ...
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