Programming - Cotangent Dev

Making custom Pluto.jl interactive components! 🎈

A month or so back I did a demonstration for a new feature in Pluto, and part of my presentation involved a basic Pluto notebook that would classify handwritten digits that you could draw directly into a Pluto notebook. One of the questions I got was "how do you make

Pluto.jl

How to Publish Pluto.jl Notebooks Online (with Interactivity!)

The possibilities of reactive notebooks are limitless, with applications spanning from data science to the classroom, and beyond! Pluto is a Julia package that lets you write reactive notebooks in Julia. If you've heard little of Pluto or Julia before, I would advise you to read through my guide for

Web

Working with the Local Filesystem in Google Chrome

With the rise of dynamic JavaScript web applications have come a plethora of browser standards that make building rich web applications possible and make the user experience more streamlined. One of the standards still largely in its infancy is the file system access API currently implemented by Google Chrome. The

Julia

How to make a Computer Inside a Computer with Julia

Computers have the remarkable property that they are capable of simulating a wide range of other systems, including themselves! But just because they can simulate themselves doesn't mean they should. No computer is 100% efficient, and so the computer being simulated must be slower than the computer simulating it. So

$How to Solve Math Problems like Writing Code$

Math

How to Solve Math Problems like Writing Code

Math is hard. For one, many of the concepts are presented very abstractly, which can make it difficult at times to relate to reality. It also has an incredible ability to convert optimism into frustration when your solution to a problem evaporates upon checking it. Only a year or so

Data Science

Working with stock market data using Robinhood Stocks and Python

I've always loved writing market analysis programs. A couple years back I used a free API called AlphaVantage. AlphaVantage still exists, but with the decline in popularity of trading commissions, the opportunity for programatic analysis and even trading has skyrocketted. Some would attribute this trend to Robinhood's commitment to commision-free

8-Bit Minecraft Computer

Building an 8-bit Computer in Minecraft - Introduction

Have you ever wondered about how computers work? If so, you're like many others, including myself. Computers are such an integral part of the modern world, and yet their workings remain mysterious for nearly everyone. It's my belief that when properly introduced, understanding and even building a computer from scratch

Pluto.jl

A guide to building reactive notebooks for scientific computing with Julia and Pluto.jl

Julia is a fantastic language combining many of the higher-level features associated with Python with speed of C. Through JIT compilation, the language itself is dynamically typed but gets converted to statically-typed blazing fast machine code just before executing. So what is a notebook, let alone a reactive one? When