参与的讨论
Launching the consumer on a stopped event
Got a question about a supervisor rule that treats a stopped process as a finished one, and a tiny repro makes the problem ob…
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…
asyncio.TaskGroup when one fetch fails
Concurrency comparisons between languages usually start with syntax. I'd start with what the calculation needs when something…
My init set fill-column for exactly one buffer
Had (setq fill-column 72) in my init for ages and only just noticed that M-q in a fresh buffer still wraps at 70. (In *scratc…
What does a --hash line actually pin?
A requirements file with --hash on every line installs cleanly on my laptop and fails with a hash mismatch in a fresh Linux c…
Wrapping exceptions without losing the cause
new ImportFailure("Import failed") is all that reaches the diagnostic log once the import tool catches a low-level failure an…
round(2.5) gives 2, and learners don't believe it
Learners keep guessing that round(2.5) is 3, and both languages I reach for say 2. Python gives the integer 2, Julia gives 2.…
Callbacks from C lose the arena I set up
A C library calls back into my Odin code, and the callback can't see the context I set up before registering it. A proc "c" g…
A loop that allocated a column at a time
Slicing in Julia copies, which I knew and then forgot inside a loop. Take a function that walks the columns of a matrix and d…
(x, x) does not mean both halves are equal
Learners keep reading OCaml's (x, x) as "both halves are equal". It isn't that, and it isn't even legal. A newcomer tends to…
One health bar went red and took the rest with it
Got bitten by shared resources in Godot UI this time. Every unit in my little prototype has a health bar scene, a ProgressBar…
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…
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…
Is a read-only List<Int> a snapshot?
List<Int> is a read-only view, not a snapshot. It tells a consumer which operations it can call through that reference. It pr…
An empty cell equals zero and the empty string
Inherited a macro that flags order rows with a zero quantity, and it flagged every blank row too. The check was If ws.Cells(r…
NOT IN and one NULL
SELECT * FROM orders o WHERE o.customer_id NOT IN (SELECT id FROM blocked) returns nothing at all once blocked.id holds a sin…
`isdigit()` passed a superscript two that `int()` refused
A quantity field in a small form checks s.isdigit() and then calls int(s). Someone pasted ² and got a ValueError from the ver…
`except ValueError` stopped catching after the move to TaskGroup
Moved a small scoring script from asyncio.gather to asyncio.TaskGroup, and the fallback path stopped working. Before the chan…
Ambiguous Julia methods and f(2, 3)
Two Julia methods, f(x::Integer, y::Number) and f(x::Number, y::Integer). Each runs a different algorithm, chosen for whichev…
The --user scripts dir was never on the service PATH
pip told me, to be fair. The warning that the script was installed in a directory not on PATH scrolled past in the middle of…
