SKskruger·Nov 21, 2021
For inspiration, here’s the full solution set for the 2015 edition in around 100 loc of k. Yes, all problems.
https://github.com/KxSystems/kdb/blob/master/ad.k
In Advent of Code 2021KxSystems
kdb
HTML2017–2025
KxSystems / kdb
kdb
Companion files to kdb+ and q
13Distinct people
15Mentions
0Explicit recommenders
477GitHub stars
What to know before exploring
What it is
Companion files to kdb+ and q
GitHub
Where it is used
No documented product use was verified in the last source check.
What people are saying
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This week on Hacker News
Nov 8–Nov 15 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/15/2026, 12:45:45 PM UTC.
No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.
Mentions over time
HN mentions by year15 dated mentions
Observed mentions: 2017-11-18 01:38:21 UTC to 2025-02-10 18:05:32 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2017 | 2017-01-01 00:00:00 UTC | 2018-01-01 00:00:00 UTC | 4 | 0 | 4 |
| 2018 | 2018-01-01 00:00:00 UTC | 2019-01-01 00:00:00 UTC | 2 | 0 | 2 |
| 2019 | 2019-01-01 00:00:00 UTC | 2020-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2020 | 2020-01-01 00:00:00 UTC | 2021-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2021 | 2021-01-01 00:00:00 UTC | 2022-01-01 00:00:00 UTC | 2 | 0 | 2 |
| 2022 | 2022-01-01 00:00:00 UTC | 2023-01-01 00:00:00 UTC | 2 | 0 | 2 |
| 2023 | 2023-01-01 00:00:00 UTC | 2024-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2024 | 2024-01-01 00:00:00 UTC | 2025-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2025 | 2025-01-01 00:00:00 UTC | 2026-01-01 00:00:00 UTC | 2 | 0 | 2 |
What Hacker News says
2 sourcesDoesn't seem that strange compared to K[1] or Q[2], which are used by Wall Street banks. K encourages you to use single-letter variables and bunch your code up as tight as possible into long lines. Here's an example: [3]. Interestingly, their Github repo has some K-inspired C[4], Java[5], C#[6], and Javascript[7].
[1] https://en.wikipedia.org/wiki/K_(programming_language)
[2] https://en.wikipedia.org/wiki/Q_(programming_language_from_K...
[3] https://github.com/KxSystems/kdb/blob/master/holiday.q
[4] https://github.com/KxSystems/kdb/blob/master/c/c/odbc.c
[5] https://github.com/KxSystems/kdb/blob/master/c/jdbc.java
[6] https://github.com/KxSystems/kdb/blob/master/c/c.cs
[7] https://github.com/KxSystems/kdb/blob/master/c/c.js
In An oral history of Bank Python