Writing a unit test in Elm

Series: Snake in Elm, Elm makes me happy, Elm Basics, Elm Unit Test

I’ve been having fun with Elm programming recently. Elm is a replacement for JavaScript that is pure functional and highly practical.

Here’s how to go from nothing installed at all to writing a unit test that passes, in just over 10 minutes.

The source code is here: github.com/andybalaam/elm-unit-test-example

How to write a programming language – Part 3, The Evaluator

Series: Lexer, Parser, Evaluator.

Finally, we get onto the actual magic of the little language I wrote (Cell) – the evaluator, which takes in syntax trees and finds their real value, in the context of the “environment”: the symbols that are defined around it.

Slides: How to write a programming language – Part 3, The Evaluator

If you want to, you can Support me on Patreon.

How to write a programming language – Part 2, The Parser

Series: Lexer, Parser, Evaluator

My little programming language, Cell (Cell Elementary Learning Language) is designed to be simple. I want to use it to explain how to write a programming language. The parser is only 81 lines long, so hopefully it’s not too hard to understand.

Here’s the explanation of the parser, which is the second part of a compiler or interpreter.

Slides: How to write a programming language – Part 2, The Parser

If you want to, you can Support me on Patreon.

How to write a programming language – Part 1, The Lexer

Series: Lexer, Parser, Evaluator

I wrote a little programming language, Cell which is supposed to be simple enough to help explain how a programming language works.

Here’s the explanation of the lexer, which is the first part of a compiler or interpreter.

Slides: How to write a programming language – Part 1, The Lexer

If you want to, you can Support me on Patreon.

Snake in Python 3 + Qt 5

Series: Groovy, Ruby, BASIC, Dart, Elm, Python3+Qt5

I’m writing the game Snake in lots of programming languages, for fun, and to try out new languages.

Python 3 broke compatibility to fix some mistakes – was it worth it? Qt 5 continues to offer more and more features – can it win me over?

Slides: Snake in Python 3 + Qt 5

If you want to, you can Support me on Patreon.