---
title: "Dawid Paszek (@deejff) | Hashnode"
description: "Senior Full Stack Developer. Read the latest articles by Dawid Paszek on Hashnode."
url: "https://hashnode.com/@deejff"
---

@deejff

# Dawid Paszek

@deejff · Bielsko-Biała · Joined March 2024

Senior Full Stack Developer

### [Grouping Power: Object.groupBy in JavaScript](https://dawidpaszek.hashnode.dev/grouping-power-objectgroupby-in-javascript?utm_source=hashnode&utm_medium=feed)

Object.groupBy

2 min read · [dawidpaszek.hashnode.dev](https://dawidpaszek.hashnode.dev/grouping-power-objectgroupby-in-javascript?utm_source=hashnode&utm_medium=feed)

[Mar 12, 2024](https://hashnode.com/posts/grouping-power-objectgroupby-in-javascript/65f067371682abd33f1ef492)

### [Reference equality in JavaScript](https://dawidpaszek.hashnode.dev/reference-equality-in-javascript?utm_source=hashnode&utm_medium=feed)

Introduction: JavaScript, being a versatile and dynamic language, offers various ways to compare values. While primitive types like numbers and strings are compared based on their content, objects and arrays are compared based on their reference in m...

3 min read · [dawidpaszek.hashnode.dev](https://dawidpaszek.hashnode.dev/reference-equality-in-javascript?utm_source=hashnode&utm_medium=feed)

[Mar 12, 2024](https://hashnode.com/posts/reference-equality-in-javascript/65f01af423defc8ec7359ffb)