Bede Kelly

Programming, Software Architecture & Music

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Guard Clauses and the List Monad

Some Haskell code on StackOverflow with appealingly concise syntax turned out to be surprisingly deep, and teach me a new type! Here's the code (collated from https://stackoverflow.com/a/20644753): So by

  • Bede Kelly
1 min read

Monads and Do-Blocks in Python

Functional programming is a bit like writing regular expressions, in that the effort-expended-per-character is really high. It’s always annoyed me how Enlightened Functional Programmers online love to use bizarre names like “ap”

  • Bede Kelly
9 min read

Hashtables in C: Table Doubling

After revising some data structures recently, I thought it'd be an interesting challenge to write some of them in C. I started with a linked list, and then went on to use the

  • Bede Kelly
2 min read

CSS Recreations

Today I recreated some designs from Polaroid and RadioShack. As ever, I don't load images for any of these designs – everything is styled with fonts and CSS. Here are two designs roughly taken

  • Bede Kelly
1 min read

Cross-Platform Resume for YouTube

I've been wanting a feature in YouTube for months now, and finally got to the point where I just decided to make it myself. The problem: if I'm playing a video on my

  • Bede Kelly
4 min read

Pose, FLIP, Animations!

I've been learning to use Hooks, and I thought it'd be a good time to get my head around the popular Pose declarative animations library. Animations have always been something I've shied away

  • Bede Kelly
2 min read

60fps Parallax Animation with SVG

Try it out here!I mainly made this because I wanted to try out drawing in Illustrator, but I've also wanted to try recreating Github's cursor-based parallax (seen on their 404 pages) for

  • Bede Kelly
3 min read

Animating Lines with SVG

I've never actually used SVG before, which seems like a gap in my knowledge – I'm pretty comfortable with CSS now (see my recreation of a MacOS security modal), and I've tried my hand

  • Bede Kelly
2 min read

Camera Automation

I bought a camera yesterday. This is the camera I bought:Sony WX-500 Compact Camera. Credit: sony.co.uk.I bought it because I wanted something cheap to point-and-shoot amateur photos of fjords,

  • Bede Kelly
4 min read

Crazy Idea #78: Full-Stack Elm Architecture

I've recently dug into using Redux with React apps, and it's got tons in common with Elm – both have an 'immutable state tree' and represent changes to that tree using Actions. Elm has

  • Bede Kelly
4 min read

TinyBuf: Binary Serialization

After reading some of Google's ProtoBuf documentation, and working extensively with Apache Thrift, I decided I could learn most effectively by creating my own proof-of-concept binary serialization framework. I would work in a

  • Bede Kelly
6 min read

Functional Inventory Design

I'd like to write a story game in Elm, along the lines of my previous browser game 5:28. However I'd like to design it with a modern frontend framework, rather than stringing

  • Bede Kelly
2 min read

Calculating Logarithmic Semitone Cents

While writing a blog post about phone keypad sounds, I realised I'd never done the maths to work out how semitone cents would be split up logarithmically. So here's a run-down of how

  • Bede Kelly
2 min read

Phone Keypad Tones

I've always been interested in phone keypad sounds, so I tried to replicate them. Here's what I managed to work out just by ear: Each key has a unique sound The unique sound

  • Bede Kelly
3 min read

Bewitching the Coding Interview

A spoof. With thanks (and apologies) to Aphyr. The interviewer greets you as you step into the bright, open workspace. Sunlight streams onto his rugged, handsome face as he introduces himself. “Kris”, he

  • Bede Kelly
    Bede Kelly
4 min read

How to Render a Fractal, Fast

Recently I've been working on a project I've called Brot, after the Mandelbrot set. It started out as a simple image renderer, but soon blossomed into a full-scale video zoom renderer: The code

  • Bede Kelly
    Bede Kelly
5 min read

$1.20: A Serverless Spending Tracker

Since moving to London, I've built a handful of tools to help me keep on top of my finances. They're not finished, or even particularly polished, but they're incredibly handy! Partly as a

  • Bede Kelly
    Bede Kelly
3 min read

Profiling Hashtables in C

Hashtables are a neat way of storing (key, value) pairs with fast lookup, insertion and deletion times. I've written a simple implementation of a hashtable with a view to making an extremely easy-to-understand

  • Bede Kelly
    Bede Kelly
3 min read

Google Cloud Functions

In the spirit of fairness, since I've spent so much time using AWS Lambda functions, I thought I'd give Google's latest offering a try. However, following the instructions to create a simple cloud

  • Bede Kelly
    Bede Kelly
3 min read

Preprocessor Polymorphism

The preprocessor included with C compilers is a strange beast. By far its most common use is to #include various header files, and to #define static variables for later use. But there's other,

  • Bede Kelly
    Bede Kelly
1 min read

Swing in Seven

Swing can make or break a track. Have a listen to this clip of a drum beat without any swing: Sounds kinda lame, right? Let's ignore the sounds for a second and concentrate

  • Bede Kelly
    Bede Kelly
4 min read

Build Your Own Enum!

After programming in Java for altogether too long, I've developed a healthy appetite for the humble Enum. There's a problem, though: Python's enum is ugly. Ugly as hell: class Something(Enum): x = 1

  • Bede Kelly
    Bede Kelly
4 min read

DockerBox

I've had an idea brewing for a while. I'd like to be able to use a single command, available on any device with SSH, to load a fresh image of any operating system

  • Bede Kelly
    Bede Kelly
2 min read

Side Project: Text Game

So I've finally got around to making a text game! Sort of. Instead of running in a text-based environment like a console and accepting English-language commands as input, I made the decision to

  • Bede Kelly
    Bede Kelly
2 min read

Goroutines and Concurrency

I recently watched Rob Pike's talk on Concurrency Patterns in Go, and was really impressed by how easy it was to make solid concurrent code without relying on threads, mutexes/locks or anything

  • Bede Kelly
    Bede Kelly
2 min read
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