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Git from the inside out
This essay explains how Git works. It assumes you understand Git well enough to use it to version control your projects.
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Image Processing 101
At the Recurse Center, I spent some time teaching myself image processing. When I started, I had no idea what it entailed. I just knew that it could help me recognize text, shapes and patterns and to do interesting things with them.
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Immutability is not enough
Immutable data structures – also known as persistent or purely functional data structures – are a key part of modern functional programming. Once created, immutable data structures cannot be modified. Instead, they support operations which efficiently produce a new copy of the structure with the desired changes…
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How to trick a neural network into thinking a panda is a vulture
When I go to Google Photos and search my photos for ‘skyline’, it finds me this picture of the New York skyline I took in August, without me having labelled it!
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What RESTful actually means
If you do web development, you’ve probably heard of REST. But if you’re like me, you usually just pretend to know what it is, and nod politely when someone asks you if what you’re making is RESTful. I use HTTP, err, that means it’s RESTful right? Recently, I decided to take the plunge and actually find out what this…
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The algebra and calculus of algebraic data types
Just as algebra is fundamental to the whole of mathematics, algebraic data types (ADTs) are fundamental to many common functional programming languages. They’re the primitives upon which all of our richer data structures are built, including everything from sets, maps, and queues, to bloom filters and neural networks .
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The language of choice
Propositional logic was discovered by Stoics around 300 B.C., only to be abandoned in later antiquity and rebuilt in the 19th century by George Boole’s successors. One of them, Charles Peirce, saw its significance for what we now call logic circuits, yet that discovery too was forgotten until the 1930s. In the ’50s…
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Not everything is an expression
“ Everything is an expression ” is an informal slogan of several programming languages, particularly those descended from the Lisp family. It is meant to contrast with languages that distinguish statements from expressions , such as Python, JavaScript, and C.
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