--- title: "Marcin Wosinek (@marcin-wosinek) | Hashnode" description: "JavaScript developer. Read the latest articles by Marcin Wosinek on Hashnode." url: "https://hashnode.com/@marcin-wosinek" --- @marcin-wosinek # Marcin Wosinek @marcin-wosinek · Valencia, Spain · Joined July 2021 JavaScript developer [Website](https://how-to.dev/) ### [Changes in programming made possible with AI](https://how-to.dev/changes-in-programming-made-possible-with-ai?utm_source=hashnode&utm_medium=feed) I’ve been working in programming for the last 16 years. Let’s see what changes I see in our industry that are enabled by generative AI. Rapid prototyping The last few months, I’ve been working on a set of WordPress plugins, related to event organizat... 2 min read · [how-to.dev](https://how-to.dev/changes-in-programming-made-possible-with-ai?utm_source=hashnode&utm_medium=feed) [Dec 22, 2025](https://hashnode.com/posts/changes-in-programming-made-possible-with-ai/6949460dc769656065ddc0a5) ### [Advantages of unit testing—with examples in Jasmine](https://how-to.dev/advantages-of-unit-testingwith-examples-in-jasmine?utm_source=hashnode&utm_medium=feed) Writing unit tests takes time and effort. Nonetheless, many teams insist on writing them anyway—that’s because of the benefits they bring to a project. Those benefits are mainly the following: fast feedback—unit tests speed up each iteration of twea... 5 min read · [how-to.dev](https://how-to.dev/advantages-of-unit-testingwith-examples-in-jasmine?utm_source=hashnode&utm_medium=feed) [Feb 15, 2024](https://hashnode.com/posts/advantages-of-unit-testingwith-examples-in-jasmine/65ce87d7be8a5f855585938b) ### [Pure functions and basic tests in Jasmine](https://how-to.dev/pure-functions-and-basic-tests-in-jasmine?utm_source=hashnode&utm_medium=feed) Pure functions are the perfect case for unit testing. For a given input, we always expect the same output—there is no internal state involved. Let’s take a look at a few examples and some simple tests that check if the methods work as expected. Jasmi... 5 min read · [how-to.dev](https://how-to.dev/pure-functions-and-basic-tests-in-jasmine?utm_source=hashnode&utm_medium=feed) [Feb 8, 2024](https://hashnode.com/posts/pure-functions-and-basic-tests-in-jasmine/65c5545e7803650f4c98ac25) ### [How to prepare for a job interview](https://how-to.dev/how-to-prepare-for-a-job-interview?utm_source=hashnode&utm_medium=feed) Let’s say you have a job interview in a few days. How should you prepare for it so that you can make an informed decision about joining the company, as well as make sure that your interests are taken care of? Prepare your questions An interview is a ... 4 min read · [how-to.dev](https://how-to.dev/how-to-prepare-for-a-job-interview?utm_source=hashnode&utm_medium=feed) [Feb 1, 2024](https://hashnode.com/posts/how-to-prepare-for-a-job-interview/65bb786040b87749de655087) ### [How to build a demo project](https://how-to.dev/how-to-build-a-demo-project?utm_source=hashnode&utm_medium=feed) Creating example projects is a common way of showing your skills to potential employers. Let’s take a look at what’s important to keep in mind when building personal projects with an eye toward impressing prospective employers. Simplicity Building ap... 8 min read · [how-to.dev](https://how-to.dev/how-to-build-a-demo-project?utm_source=hashnode&utm_medium=feed) [Jan 25, 2024](https://hashnode.com/posts/how-to-build-a-demo-project/65b38dd5d5ea49ad7513d0ca)