#stats

#TIL# I learned about this interesting concept called martingale.

> ... at a particular time, the conditional expectation of the next value in the sequence is equal to the present value, regardless of all prior values.

https://en.wikipedia.org/wiki/Martingale_(probability_theory)

#TIL

In PyTorch, conversion from Torch tensors to numpy arrays is very fast on CPUs, though torch tensors and numpy arrays are very different things. This is because of the Python buffer protocol. The protocol makes it possible to use binary data directly from C without copying the object.

https://docs.python.org/3/c-api/buffer.htm

Reference:
Eli Stevens Luca Antiga. Deep Learning with PyTorch: Build, Train, and Tune Neural Networks Using Python Tools. Simon and Schuster, 2020;

#TIL

How the pandemic changed the way people collaborate.

1. Siloing: From April 2019 to April 2020, modularity, a measure of workgroup siloing, rose around the world.

https://www.microsoft.com/en-us/research/blog/advancing-organizational-science-using-network-machine-learning-to-measure-innovation-in-the-workplace/

Microsoft Research

Advancing organizational science using network machine learning to measure innovation in the workplace - Microsoft Research

Is innovation another loss due to the global COVID-19 pandemic? Indicators reveal challenges to overcome—as well as opportunities to build on our collective experience gained in the last year. Measuring collaboration using network machine learning provides…

#TIL
My cheerful price for the work I am currently doing is very high...

https://www.lesswrong.com/posts/MzKKi7niyEqkBPnyu/your-cheerful-price

#git
https://mergebase.com/doing-git-wrong/2018/03/07/fun-with-git-pull-rebase/

> Some people claim “git fetch; git rebase origin/master” is equivalent to “git pull -r”, but it isn’t.

git pull -r also deals with squashes.

#TIL
> Rebase hell happens when several commits on your branch edit the same area, and upstream also touched the same area. The problem occurs because each conflict resolution will itself conflict with the subsequent commit in the series.

#TIL

https://www.reddit.com/r/todayilearned/comments/l4y427/til_larry_hillblom_the_h_of_dhl_regularly_took/

> TIL Larry Hillblom, the H of DHL, regularly took "sex safari" trips to Asia to prey on underage girls. When he died in a plane crash, 4 of the illegitimate children he fathered were able to claim $50 million each from his estate.

Reddit

From the todayilearned community on Reddit: TIL Larry Hillblom, the H of DHL, regularly took "sex safari" trips to Asia to prey…

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#til
https://youtu.be/3C2HVOB-g5s

So, volcanoes are very complicated.

YouTube

Why China's Largest Volcano Is So Unusual

Mount Paektu (also known as Changbai Mountain) is one of the largest volcanoes on earth and yet, for the longest time, nobody could explain where it came from or why it exists. Here we will discuss why this volcano is so unusual and how the geological mystery…

#TIL

https://stackoverflow.com/a/28142831/1477359

I had the same idea that git fast forward merge is more or less the same as rebase. Until I read this stackoverflow answer.

I guess we should always rebase whenever possible to maintain a clean history.

Stack Overflow

Is there a difference between git rebase and git merge --ff-only

From what I read, both of them help us get a linear history.

From what I experimented, rebase works all the time. But merge --ff-only works only in scenarios where it can be fast forwarded.

I also