Bijection -> Isomorphism / Homeomorphism / Isometry
学得有点杂，这些概念其实都有 cover，这里总结一下：
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Python: Import Enum Uniformly before Comparison
This is not considered a bug in Enum but it’s quite subtle indeed.
Ken Thompson’s NFA Simulation Algorithm
0. Retrospect
Config Mermaid.js in Minimal Mistakes theme
best place to config Mermaid.js
Config Giscus in Minimal Mistakes theme
Minimal Mistakes has some decent instructions on how to config Giscus.
Ken Thompson’s post2nfa Algorithm
书接上回 Ken Thompson’s re2post Algorithm.
Shunting Yard Algorithm
1. shunting yard 是啥？
PEG (Parsing Expression Grammars)
-1: 写在前面