StackOverflow 问题收藏夹

让程序员开心的 StackOverflow 问题，抄了又抄。

Memes

退出 Vim 编辑器 - How do I exit the Vim editor?

LaTeX

虽然 TeX Exchange 不是 StackOverflow 的一部分，但还是把相关内容贴在了这里🤪。

• 伪代码宏包介绍 - algorithm, algorithmic, algorithmicx, algorithm2e, algpseudocode = confused
• 伪代码浮动体分页 - Algorithm tag and page break
• TikZ 绘制带权图 - Showing weights on Tikz graph using "draw edge" commands
• TikZ 结点文本按基线对齐 - How to align text in TikZ nodes by baseline?
• 在 enumerate 中使用其他计数器 - How do I change the enumerate list format to use letters instead of the default Arabic numerals?

Linux & Unix

• zsh 的配置文件 - What should/shouldn't go in .zshenv, .zshrc, .zlogin, .zprofile, .zlogout?

Python

科学计算

• 不要逐行遍历 pandas.DataFrame - How to iterate over rows in a DataFrame in Pandas
• pandas.Series 和布尔值 - Truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all()
• numpy 下标数组转换为掩码数组 - How can you turn an index array into a mask array in Numpy?
• pandas.DataFrame 分块遍历 - How to iterate over consecutive chunks of Pandas dataframe efficiently
• 字符串搜索算法 - Python/NumPy first occurrence of subarray

渐进类型

• 递归数据结构的类型标注 - How do I type hint a method with the type of the enclosing class?

IPython

• 不改变单元格语言的情况下禁用某一单元格的执行 - IPython Notebook: Elegant way of turning off part of cells?

Rust

• 字符串相关类型的转换 - How do I convert between String, &str, Vec<u8> and &[u8]?

Java

• Java 泛型
  • 泛型约束：协变（covariance） extends K 和逆变（contravariance） super K
    • 泛型中的 super 关键字 - Java generics super keyword
    • ? super T 语法 - Generics..? Super T
    • super 和 extends 约束的区别是什么 - What is the difference between 'super' and 'extends' in Java Generics
• ArrayList 翻转 - What is the Simplest Way to Reverse an ArrayList?

JavaScript / TypeScript

• 异步
  • to .then or not to .then - How do I tell if an object is a Promise?

C / C++

• C 头文件守卫预处理指令 - Why are #ifndef and #define used in C++ header files?