Engineer Sushil Kumar Sushil Kumar Profile
Service workers are a crucial component of modern web development, particularly in the realm of Progressive Web Apps (PWAs). Essentially, service workers are scripts that run in the background of a web application, separate from the web page, intercepting and handling network requests and enabling features like offline support, push …
javascript
January, 2024
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31 January
What is IIFE in Javascript?
IIFE stands for Immediately Invoked Function Expression. It’s a common pattern in JavaScript where you define and execute a function all in one go. Here’s a basic example: (function() { // Your code here })(); This construct creates a function expression enclosed within parentheses (function(){}), and then immediately invokes it …
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31 January
What is hoisting in javascript with example?
Hoisting in JavaScript is a behavior where variable and function declarations are moved to the top of their containing scope during the compilation phase, regardless of where they are declared in the code. This means that you can access variables and functions before they are declared in your code. However, …
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30 January
What are the differences between var, let and const in JavaScript?
var, let, and const are all used for variable declaration in JavaScript, but they have some differences in terms of scope, hoisting, and mutability: var: Variables declared with var are function-scoped or globally scoped, but not block-scoped. They are hoisted to the top of their function or global scope, which …
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30 January
What are truthy and falsy values in JavaScript?
In JavaScript, a value is considered “truthy” if it evaluates to true when evaluated in a boolean context. Conversely, a value is considered “falsy” if it evaluates to false when evaluated in a boolean context. Here’s a breakdown of truthy and falsy values in JavaScript: Truthy values: Non-empty strings: Any …
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30 January
How many ways have to initialise a JavaScript Array?
Sure, there are several ways to initialize a JavaScript array. Here are some common methods: 1. **Using an array literal**: The simplest way to create an array is by using square brackets `[]`: const arr1 = []; // Empty array const arr2 = [1, 2, 3]; // Array with elements …
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30 January
How can I truncate a string to a specified length using JavaScript?
You can truncate a string to a specified length in JavaScript using various methods. One common approach is to use the `slice()` method to extract a portion of the string up to the desired length. Here’s an example function that truncates a string to a specified length: function truncateString(str, maxLength) …
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30 January
Split a JavaScript string into words.
To split a JavaScript string into words, you can use the split() method, which divides a string into an array of substrings based on a specified separator. If you want to split the string into words, you can use a regular expression as the separator to split the string wherever …
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30 January
What is callback Function?
A callback function, in programming, is a function that is passed as an argument to another function and is executed after some operation or event has occurred. Callback functions are commonly used in asynchronous programming, where tasks are performed concurrently and the program doesn’t wait for one task to finish …
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23 January
Javascript code snippets for interview with Answer
Certainly! Here are a few JavaScript code snippets that are commonly used in interviews, along with their explanations: Reverse a String: Question:Write a function to reverse a string. Answer:javascript function reverseString(str) { return str.split('').reverse().join(''); } Check for Palindrome: Question:Write a function to check if a given string is a palindrome. …
June, 2023
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24 June
how many types of functions in javascript?
JavaScript supports several types of functions. Here are some commonly used function types in JavaScript: Named Function: A function with a specified name that can be called using its name. For example: function add(a, b) { return a + b; } Anonymous Function: A function without a name, often assigned …
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15 June
Here are some common interview questions and answers related to microservices:
Q1: What are microservices? A1: Microservices are a software architecture pattern where an application is built as a collection of small, loosely coupled, and independently deployable services. Each service is responsible for a specific business capability and can be developed, deployed, and scaled independently. Q2: What are the benefits of …
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10 June
Top Javascript Interview Questions and answer
1.) What is JavaScript? JavaScript is a high-level, interpreted programming language primarily used for building interactive web pages and web applications. It provides dynamic functionality, enables client-side and server-side scripting, and can be used alongside HTML and CSS to create dynamic web content. 2.) What are the different data types …
September, 2022
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24 September
How to swap two numbers without using a temporary variable?
Solution – 1 – Using Arithmetic Operators function swapNumb(a, b){ console.log('Before swap Output: ','a: ', a, 'b: ', b); b = b -a; a = a+ b; b = a-b; console.log('After swap Output: ','a: ', a, 'b: ', b); } swapNumb(2, 3); Solution – 2 – Using Bitwise XOR function …
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23 September
How to Create and get nth Fibonacci series number?
What is the Fibonacci series? Fibonacci series is the series of numbers that are calculated by adding the values of the previous two numbers in the sequence. The first two numbers of the sequence are zero and one. It is also known as the golden ratio. We can represent the …
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18 September
Simple JavaScript code in promises.
function promiseExample(){ const promise = new Promise((resolve, reject) =>{ resolve('successfully!'); }) .then((resolve) => console.log(resolve)) .catch((reject) => console.log(reject)); return promise; } promiseExample() I have a create simple code example for promises. you can easily check. how to resolve is working? and how to reject is working?
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12 September
You are given a two-digit integer n. Return the sum of its digits.
You are given a two-digit integer n. Return the sum of its digits. Example For n = 29, the output should be solution(n) = 11. Input/Output [execution time limit] 4 seconds (js) [input] integer n A positive two-digit integer. Guaranteed constraints: 10 ≤ n ≤ 99. [output] integer The sum …
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12 September
Given an array of integers a, your task is to count the number of pairs i and j (where 0 ≤ i < j < a.length), such that a[i] and a[j] are digit anagrams.
Given an array of integers a, your task is to count the number of pairs i and j (where 0 ≤ i < j < a.length), such that a[i] and a[j] are digit anagrams. Two integers are considered to be digit anagrams if they contain the same digits. In other …
September, 2017
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23 September
Javascript Bundling in Magento 2
Javascript bundling is a technique that groups separate files in order to reduce the number of HTTP requests that are required to load a page. Bundling is commonly used in today’s “module-based” development where some functionalities are basically split into Modules (roughly explained). For loading modules, we usually use some of popular module loaders such... The post Javascript Bundling in Magento 2 appeared first on Inchoo. Do you need any custome Development Click here and fill the form with full your requirement and after i will send the quotes of your work requirements....
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23 September
More/Less functionality in Magento2
Everything you need to know on how to setup more/less functionality in Magento 2 The post More/Less functionality in Magento2 appeared first on Inchoo. Do you need any custome Development Click here and fill the form with full your requirement and after i will send the quotes of your work requirements....