ssanderson.bsky.social

I’ve found this to be a useful general technique any time I’m implementing code that that involves tricky optimizations.

Often a good testing strategy is: does my fancy optimized implementation match the obviously correct, too-slow-for-production-but-fine-for-tests implementation.

6. Expressions This chapter explains the meaning of the elements of expressions in Python. Syntax Notes: In this and the following chapters, extended BNF notation will be used to describe syntax, not lexical anal...

Grammar-wise, this logic applies to anything in docs.python.org/3/reference/..., which also includes `in` and `not in`.

A Python repl showing the following text: In [3]: x = 5 In [4]: x is not None Out[4]: True In [5]: x is not None == True Out[5]: False

Even more surprising: `is` and `is not` is this same chaining logic, so you can chain them with other comparisons in non-obvious ways:

SKITTLES POP’d Crunch the Rainbow, Taste the Rainbow with freeze-dried SKITTLES POP’d. Explore iconic Original and Sour flavors with a new crispy texture.

Skittles popd implies the existence of skittles pushd. www.skittles.com/popd

Last year’s rust survey showed VSCode being most used by a healthy margin: blog.rust-lang.org/images/2024-...

Huge congrats to the @ferroussystems.bsky.social team for Ferrocene (a safety critical Rust distribution) now being qualified for use in medical devices (IEC 62304)!

And for maintaining a 3-month release cycle, which is *unusually* fast for that ecosystem!

public-docs.ferrocene.dev/main/release...