Git tips Understand the commit tree Updated 2025-07-16
This is the most important thing to understand Git!
You must:
- be able to visualize the commit tree
- understand how each git command modifies the commit DAG
Perl HOWTO Updated 2025-07-16
Robot Operating System Updated 2025-07-16
Sometimes you can debug software by staring at the code for long enough Updated 2025-07-16
A senior developer came over, and rather than trying to run and modify the code like an idiot, which is what Ciro Santilli usually does (see also experimentalism remarks at Section "Ciro Santilli's bad old event memory"), he just stared at the code for about 10 minutes.
We knew that the problem was likely in a particular function, but it was really hard to see why things were going wrong.
After the 10 minutes of examining every line in minute detail, he said:and truly, that was the cause.
I think this function call has such or such weird edge case
And so, Ciro was enlightened.
AI brittleness and robustness Updated 2025-07-16
Dizi (instrument) Updated 2025-07-16
Git tips How to modify the commit tree Updated 2025-07-16
Image generation Updated 2025-07-16
Spacetime diagram Updated 2025-07-16
Answer: it can give some qualitative intuition on what is larger/smaller happens before/after based only on arguably more intuitive geometric considerations, without requiring you to do any calculations, see e.g. Figure "Spacetime diagram illustrating how faster-than-light travel implies time travel".
List of tropes Updated 2025-07-16
Martial art Updated 2025-07-16
Quantum control system Updated 2025-07-16
Some people call it "operating System".
The main parts of those systems are:
- sending multiple signals at very precise times to the system
- reading out some quantum error correction bits and sending error correcting signals back in a control loop
Quran character Updated 2025-07-16
Spacetime interval Updated 2025-07-16
In the Galilean transformation, there are two separate invariants that two inertial frame of reference always agree on between two separate events:
- time
- length, given by the Pythagorean theorem
However, in special relativity, neither of those are invariant separately, since space and time are mixed up together.
Note that this distance can be zero for two events separated.
Tor.link Updated 2025-07-16
Live January 2024.
Electronic band theory Updated 2025-07-16
How are the bands measured experimentally?
Why are there gaps? Why aren't bands infinite? What determines the width of gaps?
Bibliography:
- Applications of Quantum Mechanics by David Tong (2017) Chapter 2 "Band Structure"
Leonard Susskind Updated 2025-07-16
The bald confident chilled out particle physics guy from Stanford University!
Also one can't stop thinking abot Leonard Hofstadter from The Big Bang Theory upoen hearing his name.
View top posts of previous months or years in Reddit Updated 2025-07-16
No good per-sub way as of 2022:
- www.reddit.com/r/help/comments/27eziq/view_top_posts_of_a_specific_timespan/
- www.reddit.com/r/help/comments/9ebxl3/how_do_i_find_old_posts_on_a_subreddit/
- www.reddit.com/r/help/comments/aywras/how_do_i_search_reddit_for_posts_in_a_specific/
- www.reddit.com/r/modhelp/comments/etsomx/how_to_get_top_posts_of_past_months_of_subreddit/
- www.reddit.com/r/redditdev/comments/kaf1yz/finding_top_post_of_specific_month/
- www.reddit.com/r/changelog/comments/k663qy/introducing_rereddit_go_back_in_time_to_see_top/
- www.reddit.com/r/help/comments/stui9i/is_it_possible_to_look_up_the_top_posts_of_the/
Wang Jin (Water Margin character) Updated 2025-07-16
He used to train the 800,000 imperial guard troops at the Capital, much like Lin Chong. He's not one of the 108 Stars of Destiny.
Samurai cinema Updated 2025-07-16
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