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Activity for Emily
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Edit | Post #291036 | Initial revision | — | 2 months ago |
| Answer | — |
A: Why does bash seem to parse `sh -c` commands differently when called via `execl`? Because `execl`'s first argument isn't `argv[0]`. `execl("/bin/sh", "-c", ...)` runs the executable `/bin/sh`, but sets its `argv[0]` to `"-c"`, as if one had created a link called `-c` pointing at it and run that. The correct way to do this is `execl("/bin/sh", "sh", "-c", ...)`. Busybox works... (more) |
— | 2 months ago |
| Edit | Post #291035 |
Post edited: |
— | 2 months ago |
| Edit | Post #291035 | Initial revision | — | 2 months ago |
| Question | — |
Why does bash seem to parse `sh -c` commands differently when called via `execl`? When I do this in a shell: ```plain $ /bin/sh -c 'echo hello world' hello world ``` it's my understanding that I'm running a process with `argv = {"/bin/sh", "-c", "echo hello world"}`. That is, the quotes cause all three words to be passed as one argument to `sh`, and that instance of `sh` is r... (more) |
— | 2 months ago |
| Edit | Post #290010 |
Post edited: rm stray extra question mark |
— | 7 months ago |
| Edit | Post #290011 | Initial revision | — | 7 months ago |
| Answer | — |
A: How do I share a type between a client and server, but make a specific field optional for one and required for the other? This can be done using conditional types. I defined these helper types: ```typescript enum Role { server, client }; type PossiblyHiddenFromClients = T | (R extends Role.client ? undefined : never); ``` When R is `server`, this type reduces to `T` (via `T | never`); when R is `client`... (more) |
— | 7 months ago |
| Edit | Post #290010 | Initial revision | — | 7 months ago |
| Question | — |
How do I share a type between a client and server, but make a specific field optional for one and required for the other? Let's say I have a client/server application with a data structure on the server side: ```typescript type User = { name: string; superSecretGovernmentIdNumber: string; }; ``` These fields are both non-nullable; all users in this system have a `name` and a `superSecretGovernmentIdNumber... (more) |
— | 7 months ago |
| Comment | Post #289737 |
Hrm. I definitely learned some things, but I think I phrased this specific question far too generally for them to make sense as answers to it. I may sit down at some point this week and distill them into a few separate self-answered questions. (more) |
— | 8 months ago |
| Comment | Post #289737 |
Probably wouldn't have helped in this case, depending on whether I got lucky and copied the right rows. The answer for this particular query (which I eventually found via extensive use of commenting things out and staring really hard) wound up being a series of joins that *looked* (to both me and `EX... (more) |
— | 8 months ago |
| Comment | Post #289741 |
Edited `SELECT` into the question for clarity, thanks.
The query in question is mostly autogenerated at runtime, and is a search with arbitrary user inputs, but the complexity is entirely due to the application I work on having abnormally complicated visibility permission rules (it's bad even with... (more) |
— | 8 months ago |
| Edit | Post #289737 |
Post edited: |
— | 8 months ago |
| Edit | Post #289737 |
Post edited: clarity |
— | 8 months ago |
| Edit | Post #289737 | Initial revision | — | 8 months ago |
| Question | — |
Alternatives to `EXPLAIN ANALYZE` for queries that won't complete I have a large and complex PostgreSQL `SELECT` query that I would like to make faster. `EXPLAIN` suggests it should run quickly, with the worst parts being scans of a few thousand rows. When run, it does not complete in any reasonable amount of time (if `statementtimeout` is set to infinite, it event... (more) |
— | 8 months ago |