How I Built a NumPy-Like Library in Pure JavaScript

How I Built a NumPy-Like Library in Pure JavaScript While learning data science with Python, one library impressed me more than any other: NumPy. NumPy contains many essential numerical and statistical functions that make working with data much easier. Instead of writing complex mathematical logic from scratch, you can simply call built-in functions such as mean , sum , or dot . As I continued learning, a question came to my mind: “Can I build something similar using pure JavaScript?” This curiosity led me to explore how NumPy works internally and how its core ideas could be recreated in another language. After studying the concepts and experimenting with JavaScript, I started building a small numerical utility library inspired by NumPy. In this essay, I will explain how I built that library and the logic behind some of its functions. Starting with Basic Arithmetic After understanding the core idea, I started with the simplest building blocks: basic arithmetic operations . These functi