Dmitriy Kubyshkin

way into all the nerdy computer science stuff

[Dmitriy Kubyshkin @d_kubyshkin]

One use case I can see AI glasses could solve that no other devices can is contextual reminders - when I eat, leave home, etc. This could be a game changer for elderly with memory issues too. Of course personally I would only consider using that with local processing.

[Dmitriy Kubyshkin @d_kubyshkin]

Would be great if CSS allowed to refer to the computed element size in properties that cannot affect said size, i.e. transforms, animations and transitions.

Maybe I should use this an excuse to dive into @ladybirdbrowser and build a prototype 😅.

[Dmitriy Kubyshkin @d_kubyshkin]

I think React hooks may have been a net negative. They do provide a very powerful API, but:
- there are way too many gotchas
- it is too easy to write spaghetti code
- if I want to less rerenders, my code becomes a wall of useMemo / useCallback

[Dmitriy Kubyshkin @d_kubyshkin]

@jarredsumner @jarredsumner this is a large legacy closed source project so no code snippet easily possible. The diagnostic report on Mac say it is a good old null-pointer exception. Please DM me if you want the .ips file.

[Dmitriy Kubyshkin @d_kubyshkin]

Tried https://t.co/FzprfOX0PK:

> bun test
segmentation fault

I guess it needs to bake some more… 🙃

[Dmitriy Kubyshkin @d_kubyshkin]

I often consider dropping @WebStormIDE in favor of something more lightweight, but it’s static analysis is still way superior to what anything else JS/TS related offers.

Saved my butt more than once. I only wish I could run its checks on CI, not just in the IDE.

[Dmitriy Kubyshkin @d_kubyshkin]

@realamrutpatil This doesn’t come up often but if you imagine some kind of callback / notification system usually there is only one variant of the callback and it is generally nicer if that can be called uses batches instead of individual items. Bonus points for configurable batch size.

[Dmitriy Kubyshkin @d_kubyshkin]

Programming tip:

If you make an API to do something, and you can imagine people needing to call it more than once, it should probably have a bulk version. Or even only have a bulk version.

This is especially important for IO workloads including HTTP, RPC, DB, etc.

[Dmitriy Kubyshkin @d_kubyshkin]

It has been a while, but I just published new compiler programming video. Continuing my from-scratch language and a compiler written in C. This time working on a built-in debugger:
https://t.co/tK7sC5oCvR

[Dmitriy Kubyshkin @d_kubyshkin]

I just wanted to write a small exploration project to better understand Lottie animation file format.

3 levels deep in yak shaving and I am writing a compiler for matching expressions in AST-like data structures 😅

[Dmitriy Kubyshkin @d_kubyshkin]

I now have very mixed feelings about the optional chaining (foo?.bar) in JavaScript.

It is useful occasionally, but at the same time it makes it way too easy to have loosely typed and validated data floating around throughout the whole codebase 🤔

[Dmitriy Kubyshkin @d_kubyshkin]

Every few years I try to make a code editor (syntax highlighted) in a browser that works without a custom text input and undo / redo system like CodeMirror, or VSCode do.

So far it always turned into a hackfest and ultimately failed. Going for round 6 or 7 now... Wish me luck🍀

[Dmitriy Kubyshkin @d_kubyshkin]

My JavaScript parser can now also print the source code (with poor formatting) and parse it again with the identical AST. 🎉

This is surprisingly harder than it sounds because of all the dark corners of the JS grammar.

Now I'm going to indulge myself in some more optimization.

[Dmitriy Kubyshkin @d_kubyshkin]

Got distracted optimizing. Now the speed is within a margin of error compared to Acorn. This is quite exciting as it means there is still a lot of space to be much faster.

[Dmitriy Kubyshkin @d_kubyshkin]

My parser passes full test262 suite (22k+ tests) 🎉
Speed is also pretty good: ~20% slower than Acorn

Next step: pretty printing and roundtrip tests.

[Dmitriy Kubyshkin @d_kubyshkin]

JavaScript regex literal syntax is a cautionary tale on how a small feature / decision can completely screw you over in a long run. Even C/C++ typedefs aren't as bad for parser writers.

[Dmitriy Kubyshkin @d_kubyshkin]

@NicoloRibaudo @typescript @github You can do it yourself for your repos: https://t.co/VEmEbcW7Yk

[Dmitriy Kubyshkin @d_kubyshkin]

I wonder if I know someone who could say why both Windows and Mac OS updates take 10s of minutes to complete. In that time you could overwrite full capacity of the SSD dozens of times.

This is not a troll tweet - I actually want to know.

[Dmitriy Kubyshkin @d_kubyshkin]

Been spending a few evenings on writing a JS parser and all I can say is that the language has quite a few dark corners. And haven't even touched the whole regex literal mess yet. Progress is pretty good though (>50% of test262)

[Dmitriy Kubyshkin @d_kubyshkin]

TIL that in JavaScript you can put property access part of the method call in parens and will still get the correct "this" 🤯

("foo".startsWith)("foo")

is the same as:

"foo".startsWith("foo")