Ben Chuanlong Du's Blog

It is never too late to learn.

Operators in Different Programming Languages

Python Bash C/C++ Java Julia
and and -a && && &&
or or -o || || ||
not not ! ! ! !
bit and & & & & &
bit or | | | | |
bit not ~ ~ ~ ~ ~
bit xor ^ ^ ^ ^ ^
vector and
vector or
vector not
equals == -eq == == ==
not equal != -ne != != !=
greater than > -gt > > >
less than < -lt < < <
greater than or equal to >= -ge >= >= >=
less than or equal to …

Gitignore Examples

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

Tips and Traps

  1. You can ignore files in the root directory only by prefixing a pattern with /. For example, if you want to ignore the file features.txt in the root …

Visual Studio Code for Java Development

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

Java Development in Visual Studio Code

https://code.visualstudio.com/docs/languages/java

https://www.youtube.com/watch?v=RJIfsSmU9zk

https://iseif.dev/2019/06/05/vscode-as-java-ide/

https://github.com/redhat-developer …

Write Unit Tests Using PyTest in Python

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

Run pytest in the root directory of your project to run all test suites. You can run test cases in a specific test file (e.g., test_file.py) using the command …

Data Types in Different Programming Languages

Things on this page are fragmentary and immature notes/thoughts of the author. Please read with your own judgement!

Data Type C C++ Rust Java Python numpy pyarrow Spark SQL SQL
8 bit integer short (16-bit) int8_t i8 short (16-bit) int (arbitrary precision) int8 TinyInt …