Observation record / Hacker News

Java sealed classes and exhaustive pattern matching

First seen 10/18, 23:40 · Last observed 10/19, 21:06 · Source data is current

Title-based outlineJava sealed classes and exhaustive pattern matching

Why it mattersA discussion on this source’s current list. Verify details in the original; rank does not establish reliability.

This content was published earlier. Fetch success does not imply freshness.

Published 10/18, 22:47

30 minutesRank movement—

Building history

1 hourRank movement—

Building history

24 hoursRank movement—

Building history

Source rank history

129 observations

Building history; no inferred heat score.

Official public API · linked titles only· Author hnisjafx40

View original observation times and ranks

Observation time (Beijing)	Source position
10/19, 21:06	29
10/19, 20:56	30
10/19, 20:45	30
10/19, 20:35	30
10/19, 20:25	30
10/19, 20:15	29
10/19, 20:05	28
10/19, 19:55	28
10/19, 19:45	28
10/19, 19:35	28
10/19, 19:25	26
10/19, 19:15	24
10/19, 19:05	24
10/19, 18:55	25
10/19, 18:45	27
10/19, 18:35	27
10/19, 18:25	25
10/19, 18:15	25
10/19, 18:05	25
10/19, 17:55	26
10/19, 17:45	26
10/19, 17:34	25
10/19, 17:24	25
10/19, 17:14	26
10/19, 17:04	27
10/19, 16:54	27
10/19, 16:44	26
10/19, 16:34	26
10/19, 16:24	25
10/19, 16:14	25
10/19, 16:04	25
10/19, 15:54	23
10/19, 15:44	22
10/19, 15:34	22
10/19, 15:24	21
10/19, 15:14	21
10/19, 15:04	20
10/19, 14:54	20
10/19, 14:44	20
10/19, 14:34	22
10/19, 14:24	22
10/19, 14:14	21
10/19, 14:04	22
10/19, 13:54	21
10/19, 13:44	23
10/19, 13:33	23
10/19, 13:23	22
10/19, 13:13	21
10/19, 13:03	21
10/19, 12:53	21
10/19, 12:43	23
10/19, 12:33	23
10/19, 12:23	21
10/19, 12:13	22
10/19, 12:03	22
10/19, 11:53	21
10/19, 11:43	21
10/19, 11:33	21
10/19, 11:23	22
10/19, 11:13	22
10/19, 11:03	23
10/19, 10:53	20
10/19, 10:43	19
10/19, 10:33	19
10/19, 10:23	19
10/19, 10:13	19
10/19, 10:03	19
10/19, 09:52	19
10/19, 09:42	20
10/19, 09:32	18
10/19, 09:22	17
10/19, 09:12	17
10/19, 09:02	17
10/19, 08:52	18
10/19, 08:42	17
10/19, 08:32	16
10/19, 08:22	15
10/19, 08:12	15
10/19, 08:02	15
10/19, 07:52	13
10/19, 07:42	13
10/19, 07:32	12
10/19, 07:22	13
10/19, 07:12	13
10/19, 07:02	12
10/19, 06:52	14
10/19, 06:42	13
10/19, 06:32	12
10/19, 06:22	12
10/19, 06:12	12
10/19, 06:02	12
10/19, 05:52	11
10/19, 05:41	11
10/19, 05:31	8
10/19, 05:21	8
10/19, 05:11	9
10/19, 05:01	17
10/19, 04:51	15
10/19, 04:41	14
10/19, 04:31	10
10/19, 04:21	9
10/19, 04:11	6
10/19, 04:01	6
10/19, 03:51	8
10/19, 03:41	4
10/19, 03:31	5
10/19, 03:21	6
10/19, 03:11	5
10/19, 03:01	4
10/19, 02:51	4
10/19, 02:41	4
10/19, 02:31	4
10/19, 02:21	4
10/19, 02:11	3
10/19, 02:01	5
10/19, 01:51	6
10/19, 01:40	6
10/19, 01:30	5
10/19, 01:20	4
10/19, 01:10	4
10/19, 01:00	7
10/19, 00:50	7
10/19, 00:40	5
10/19, 00:30	6
10/19, 00:20	8
10/19, 00:10	8
10/19, 00:00	10
10/18, 23:50	13
10/18, 23:40	19

Daily aggregate history

日期	Best daily position	Last daily position	Observations
2026-10-18	13	13	2
2026-10-19	3	29	127