I Am
Volodymyr Hudyma
<FrontEndDeveloper />
Table Of Contents(Articles: 129)
1

Fibonacci Sequence In JavaScript

July 31, 2021
#JavaScript

Fibonacci Sequence is a sequence of numbers in which each number is a sum of the previous two, starting with 0 and 1. The example sequence: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, etc. It can be represented by the following formula...Read more

2

React Hooks: usePrevious

July 27, 2021
#React

Retrieving the previous state of the component is a must in some special cases. While class-based components provide an easy and convenient way to do this via the componentDidUpdate() lifecycle hook, function components do not and you need to write custom...Read more

3

Replace All String Occurrences In JavaScript

July 22, 2021
#JavaScript

Replacing all occurrences of a string is a fairly common task in JavaScript. I would not believe you if you said that you have never written any code to replace underscores with hyphens or vice versa. There are a few ways to do that...Read more

4

Git Stash Like A Pro

July 18, 2021
#Git

The developers work is often interrupted by requests to implement more important features or even to fix some critical bugs. This situation leads to stopping the development and switching to another task, but what if you didn't manage to complete the current work and you are not ready to...Read more

5

Error: 'yield' expression implicitly results in an 'any' type because its containing generator lacks a return-type annotation

July 15, 2021
#React

Due to the fact that my article on How To Add Redux Saga With TypeScript To The React Application became popular, I've been asked one question a few times already. After finishing the tutorial, you expect to have built a fully working application using the mentioned technologies, but suddenly...Read more

6

Promise.any() And AggregateError In JavaScript

July 10, 2021
#JavaScript

Nowadays, due to the increasing popularity of asynchronous programming, Promises have become an essential part of software engineer's daily routine. Promise is an object that produces a value in the future, which represents the result of an asynchronous operation. It has 3 states...Read more

7

3 Ways To Mock Axios In Jest

July 05, 2021
#JavaScript

Every developer should know how to create a function that makes an API request, and how to test it properly. While creating such a function is a relatively simple task (if you use a good HTTP client, like Axios), testing it requires some effort. It's not always good practice to...Read more

8

Logical OR/AND/Nullish Assignments In JavaScript

July 01, 2021
#JavaScript

The latest JavaScript specification, ECMAScript 2021, includes a lot of useful features, but the one we'll discuss today is Logical Assignment Operator, which is a combination of a logical operator (||, &&, ??) with an assignment (=)...Read more

9

Navigate To The Previous/Next Page In JavaScript

June 26, 2021
#JavaScript

Redirecting users from one page to another is a very common operation in web applications. In most cases we know exactly which page the user should land on after clicking a link, but sometimes we don't. Imagine you are implementing a profile page that is accessible from both, page A and page B...Read more

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