Practice

Environment variable in Linux

Ref:

Section 1: Dive into Docker

Practice Note

Read input

Read a list of input

Ref: https://stackoverflow.com/questions/15963959/reading-a-line-of-integers-in-python

Practice

Read file line by line

Here I read requirements.txt file to create an output file of commands and execute it

This is my notes while learning Flask.

Ref: https://dormousehole.readthedocs.io/en/latest/index.html

Find and Replace

Ref: https://harttle.land/2016/08/08/vim-search-in-file.html

Notes

Modify Model and Migration

The process of modifying a model:

[toc]

Learn Git Branching

This is my notes while learning https://learngitbranching.js.org/

This is the note while learning the course Missing Semester.

Ref: https://missing.csail.mit.edu/

[toc]

Java Basic

Data Type

Int and Integer

(1) 由于Integer变量实际上是对一个Integer对象的引用，所以两个通过new生成的Integer变量永远是不相等的。