| 14:05 | <jschoi> | The BigInt Math incubator call (https://github.com/tc39/Reflector/issues/433) is happening in two hours. I've just added an agenda (https://github.com/tc39/incubator-agendas/blob/main/2022/05-06.md) and am almost done with the slides (https://docs.google.com/presentation/d/1og0dwgl_0kQiOubsdwgI1X0ug0A7EEZYIJ2qv2ZDqVw/edit#slide=id.g1281fa65b8c_1_67). Hope to see as many people as possible there. : ) |
| 17:27 | <Rob Palmer> | hey delegates, a new in-person plenary attendance survey for July 2022 is awaiting your input here: https://github.com/tc39/Reflector/issues/434 |
| 17:55 | <shu> | jschoi: something i didn't comment about during the call |
| 17:55 | <shu> | why are you doing Math.abs on timestamps? are there no monotonic timestamps available? |
| 17:55 | <shu> | both performance.now() and Date.now() are monotonic afaik |
| 18:07 | <ptomato> | happily, Temporal.Duration would be good for that use case, and it has an abs() method |
| 18:31 | <jschoi> | why are you doing |
| 18:31 | <jschoi> | Afterward, I was formatting the interval differences for display as a fixed-width plain-text table in a CLI’s console output, with the decimal places aligned. I needed to check for the presence of a minus sign in order to make the minus sign not contribute to the table columns’ text alignment. |
| 18:35 | <jschoi> | There was some other BigInt statistical analysis I was doing on those intervals—quartiles, deviations, that sort of thing—which I also was formatting for display in the CLI output’s digit-aligned plain-text table. |
| 18:36 | <shu> | i see, thanks |
| 18:41 | <shu> | also what is clz32 used for? |
| 18:42 | <shu> | and why do you want that to work on bigints...? |
| 18:42 | <jschoi> | I don’t really. Someone on GitHub mentioned it. I have no concrete use cases. I would be happy to remove it. |
| 18:42 | <jschoi> | I think it was about clzN. |
| 18:42 | <shu> | yes, bitLength is a different proposal, and seems appropriate for BigInt |
| 18:42 | <jschoi> | Arbitrary bases. Possibly useful in e.g. binary data compression?… |
| 18:42 | <shu> | clz32 does not |
| 18:42 | <jschoi> | Yeah. |
| 18:42 | <shu> | bitLength has uses for like, using bigints as arbitrarily large bit vectors |
| 18:43 | <jschoi> | Yes. I myself am trying to compress all Unicode character names into a succinct lookup data structure (for Fun), so I have needed bit lengths (and I need bit rank and select). |
| 18:44 | <jschoi> | But those will come later. Well, the Unicode code space fits in Number safe integers anyway, so I guess my Unicode name needs don’t need BigInts, so I Numbers rank/select would work for me, not BigInt rank/select…though BigInt rank/select would certainly make it easier. |
| 18:46 | <jschoi> | …Anyways, Shu, I will remove BigInt clz32 and cbrt from this proposal, since WH isn’t blocking on those. |