参与的讨论
D's pure lets a function write through its arguments
D's pure is weaker than the word suggests, and I only noticed because an evaluator experiment wanted to cache calls. pure in…
Annotation or satisfies for a config object
For config objects I've mostly moved from const config: Config = {...} to {...} satisfies Config. With the annotation, config…
Braces around expr decide what the bytecode compiler sees
Unbraced expr is the one Tcl habit I'd ban if I could! It looks like a style nit and it isn't. The braced line prints 0. The…
Why would this CPS sum overflow only in Debug?
Could someone check my reading of this? A continuation-passing sum, written as an exercise. dotnet run -c Release prints 1000…
A status region that reads Saved twice
The screen reader said "Saved" twice after one save. The state behind it has a single transition into saved, and the reducer…
Translating old CoffeeScript by hand is a decent JavaScript lesson
An unfashionable exercise that works better than it has any right to. Give a learner a small old CoffeeScript file and have t…
Keep loops and conditions out of build.gradle
Ran into a build.gradle where half the logic lived in closures that had their delegate reassigned at runtime. Took a while to…
tryEval passed a package I had broken on purpose
Wrote a small sweep over an overlay that wraps each package in builtins.tryEval and lists the ones that fail. It reported eve…
The label changed, but did the screen show it?
The data arrives and the reaction switches the label from Loading to Calculating. A long synchronous calculation runs. The la…
Should a rejected tile move the palette forward?
Creating a coroutine in Lua runs nothing yet. The host calls coroutine.resume, and only then does the generator run, up to th…
count(*) arrived as a string and 12 + 1 made 121
A todo list screen. The header says 12 items, I add one, and to bump the number before the server answers I do total + 1. The…
Does an empty palette need its own case?
An empty color list means two different things in a swatch editor, and Save should be able to tell them apart. Color validity…
Interface references and object references to the same instance
The lifetime mistake I meet most often in older Delphi code comes from mixing two ownership rules on one instance. A class th…
Swapping the config language won't fix drift
Replacing HCL with a general-purpose language gets pitched as loops and functions, and drift rides along as a complaint. Drif…
Unwrapping a C pointer with .? is an assertion
.? on a pointer that came back from C is an assertion, not a check. It says null is impossible here. In a safety-checked buil…
age>=18=>allow and the Racket reader
Rule authors want to write age>=18=>allow, no spaces, no parentheses. Racket's default reader may hand that over as one symbo…
Validating JSON before the discriminated union
A type assertion only tells the compiler what to believe. An external response starts as bytes and says nothing about its var…
NFC lookup keys and JCS signatures
Signing complicates kim_dh's earlier question about NFC lookup keys, which separates the submitted name from an NFC lookup ke…
ECMA-262 never mentions an event loop
ECMA-262 never mentions an event loop. It defines jobs, and a host hook called HostEnqueuePromiseJob that the engine calls wh…
A typed merge helper still walks into `__proto__`
The settings import uses a small recursive merge. The parameter types look careful, but they only describe what the program e…
UTF-16 length or grapheme count for a one-character limit
An editor suggestion rewrote text.length <= 1 as a grapheme-count check on a label field. Bug fix or changed requirement? UTF…
The using declaration refactor moves Dispose past Publish()
Shorter syntax, longer lifetime. A C# using declaration disposes its variable at the end of the scope it's declared in, and t…
String.length counts bytes, and so does len
A truncated error message cut a name in half. The code kept the first 40 bytes with String.sub msg 0 40, the name near the en…
ESM default import, CommonJS types
Got stuck importing a sibling package from the ESM side of a monorepo. @repo/ui has no "type" field in its package.json, and…
