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Software Engineering

The most popular blog posts about software engineering on Hacker News. 1,551 posts.

2022
391

Crafting Interpreters

We’ll spend the rest of this book illuminating every dark and sundry corner of the Lox language, but it seems cruel to have you immediately start grinding out code for the interpreter without at least a glimpse of what we’re going to end up with.

402

For Want of a JOIN

Once upon a time, I was on a small team tasked with building a data pipeline. On this team was someone we’ll call Bob, who was fresh out of grad school and hadn’t had much experience with software engineering, and no experience with SQL. As part of this data pipeline, Bob had to combine the data from two tables. JOIN…

416

PHP 8.2

PHP 8.2 is a major update of the PHP language. Readonly classes, null, false, and true as stand-alone types, deprecated dynamic properties, performance improvements and more

419

What is an eigenvalue?

An eigenvalue of a square matrix $LATEX A$ is a scalar $latex \lambda$ such that $latex Ax = \lambda x$ for some nonzero vector $latex x$. The vector $latex x$ is an eigenvector of $LATEX A$ and it…