Regular expressions are still quite useful in many situations. However, there are some differences in how they are written across different programs, so it’s a good idea to make a cheat sheet for reference!
Since I started using Linux desktop distributions in my sophomore year, I have been constantly switching between different发行 versions. After a few years of fiddling around, I finally settled on Manjaro.
During my graduate studies, I had the need to display results using maps and used R to create them. I recorded the code from that time below.
Graduate training on R at the Guangdong Provincial CDC was my first serious programming course.