When Are Regexes Appropriate?

Regular expressions are useful enough that they’re built in to the syntax of the shell. But they’re not always the right tool. Here’s my off-the-cuff heuristics for when to use them.

If there is any sort of arbitrary nesting (like nested quotes and parens) and you need perfect accuracy on all sorts of inputs, don’t use regex.

If the input isn’t pathological, if accuracy isn’t required, or if you need speed, use regex.

Related Posts

Random stuff

Lossless Data Compression with Neural Networks by Fabrice Bellard

Downscaling Numerical Weather Models With GANs (My CI 2019 Paper)

Learning Differential Forms and Questions

PyTorch Lightning is worth using

Feynman Lectures, Chapter 2

Feynman Lectures 1

Random Julia Thoughts

Death Still Sucks

How I feel about ebooks