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The <input type="number"> is so evil. I thought that entering 1e309 will have its value return 1e309 and that converting it to a number will give me infinity. Nope, it will return an empty string, and converting it to a number gets me zero. Note that 1e309 IS A VALID FLOATING-POINT NUMBER according to the #HTML standard.
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Articles
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I restructured my blog
If you have not noticed, the equations on my blog are now rendered server-side. This change makes it possible for those who turn off JavaScript on their browsers to see the equations. I also updated the theme from Minima v2 to Minima v3.
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An 🎃 easy 👻 but 🍬 spooky 💀 Ruby challenge
“It’s the weekend and you’ve just completed a seance with friends. After communing with the dead, you realize a mysterious message was left behind.” What is the decoded message? Use your Ruby skills to find out!
- Categories: programming
- Tags: ruby, code golf, fooling around
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You can replace with in the Schrödinger equation?
When someone asks you why it is here instead of or the other way around, you can say that this is just a convention. My professor of quantum mechanics once asked the class similar a question, and I replied with this letter.
- Categories: physics
- Tags: quantum mechanics, letter, complex
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How to self-host Overleaf (ShareLaTeX)
It has been a pain setting up Overleaf on my own server. I have finally figured it out and I am sharing my notes here.
- Categories: guide
- Tags: linux, selfhosting, tex
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My old computers and my experience of daily driving Linux and self-hosting
I have been using Linux and self-hosting for over a year now. Overall, I would like to say that it is rather satisfactory and that I will continue to use Linux as my daily driver in future. Thinking of that, I felt a little bit nostalgic about my old computers. So I decided to write an article about my old computers and my experience of daily driving Linux now.
- Categories: misc
- Tags: linux, selfhosting
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I created Sunniesnow, a rhythm game similar to Lyrica
In order to build a better player community for the rhythm game Lyrica, I created a new rhythm game called Sunniesnow. Learn more about Sunniesnow by joining our Discord server.
- Categories: update
- Tags: update, rhythm game, web
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The distribution when indistinguishable balls are put into boxes
Suppose there are distinguishable boxes and indistinguishable balls. Now, we randomly put the balls into the boxes. For each of the boxes, what is the probability that it contains balls? This is a simple combanitorics problem that can be solved by the stars and bars method. It turns out that in the limit with fixed, the distribution tends to be a geometric distribution.
- Categories: math
- Tags: probability, combinatorics, ruby
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Labeled
break,next, andredoin Ruby
Many languages support breaking out of nested loops, such as Perl, Java, JavaScript, C#, etc. Languages that have gotocan also do this easily. However, in most other languages, it is not easy to break out of nested loops. I want to introduce a way to do this in Ruby.- Categories: programming
- Tags: meta programming, ruby
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Free trade (single good case)
I set up a simple model to determine the production and consumption in free trade between nations.
- Categories: economics
- Tags: global economy, from zhihu
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A measure-theoretic formulation of statistical ensembles (part 2)
For sake of rigor and generalizability, I feel it necessary to try to have a mathematical formulation for statistical ensembles. I chose measure spaces as the underlying mathematical structure of thermal systems and tried to justify the method of statistical ensembles by deducing them from some axioms.
- Categories: physics
- Tags: mathematical physics, statistical mechanics, functional analysis, measure theory, probability, long paper
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