I still can't decide whether M-x ielm fits into an optimal elisp workflow.
The 'strict Emacs' view is that it's better to use buffers for everything, so you can edit and build up expressions there.
The 'tailored UI' view is that ielm is better, because it's a dedicated REPL.
miniblog.
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I'm still not sure whether a language should include a "kitchen sink linter" like Rust's clippy or have a package oriented "thousand flowers bloom" linter like eslint for JS and TS.
Clippy is delightful out of the box but eslint makes it so easy to have project specific lints.
One interesting aspect of collecting coins in a platformer like mario: it makes the level stateful.
You can see if you've been somewhere before based on whether there are coins present.
I've just squeezed another 5% of performance out of difftastic by finding a few HashSet values that weren't FxHashSet.
I do wonder whether hash DoS resistance is a good default. Sure, Rust programs are often pretty fast anyway, but it feels like a different threat model to the rest of Rust.