theopn / cs193-lecture-demo-scripts

Scripts and instructions for my CS193 lecture demos

CS193 Lecture Demo Scripts

CS193: Tools is a Purdue University CS course designed to teach CS/DS/AI freshmen essential development tools such as UNIX shells, debugging tools, and Git.

You can find resources I used for demos in lectures while working as an instructor for two semesters. Future instructors are welcome to use this repository.

Lecture 2 - Essential Shell Commands

1. Run lecture2.sh to initialize ~/cs193-demos/lecture2/ folder
2. ls && ls-al, clear
3. cd c (show the tab completion) and pwd
4. cd .., touch NewFile.java, mv NewFile.java java/
5. cat ProjectVersionFinalFinalFinalActuallyFinal.java
6. mv ProjectVersionFinalFinalFinalActuallyFinal.java Pj.java
7. cat Pj.java
8. rm ProjectVersionOne.java
9. cd.. && rm -rf cpp
10. Show man vim, locate --clean option
11. vim --clean and demo Vim

Lecture 4 - SFTP/SCP

1. Run lecture4.sh clean to delete the demo folder
2. Run lecture4.sh local or lecture4.sh remote to initialize local and remote folders within ~/cs193-lecture-demo/lecture4/
3. Using tmux or two separate terminal windows, navigate to local and remote folder respectively
4. Demonstrate SFTP navigation commands (lcd, lls, lpwd)
5. Modify code.c in the remote
6. SFTP> get code.c. cat the downloaded content
7. SFTP> put -r folder_to_upload
8. scp -r <login>@remote.edu:./folder_to_download/ ./

Lecture 5 - Debugging

1. Open VowelCount.java in IntelliJ IDEA
2. Show java: bad operand types for binary operator '==' error and error highlighting
3. Set a breakpoint before the countVowels call, start the debugger
4. Show "step over" (line by line in the current method)
5. Show "step into" (stepping into a method)
6. Fix the issue by changing the string to all lowercase using input = input.toLowerCase()

Lecture 6 - Intro to VCS and single-user ADD-COMMIT-PUSH workflow

1. Make a new GitHub repository. Show the message for git init command (just mention it) and clone the repository
2. Show that the cloned repository is a regular directory with .git folder using ls -la command
3. Create a new file called hello.py. Make a new line
4. Show git status command
5. git add . && git commit
6. Show that the change is not available on the remote repository
7. Add a new line to the file, git add . && git commit -m "(message)"
8. git push and show that the commits have been reflected on the remote repository
9. git log && git revert <commit-id>
10. git push

Lecture 8 - Merge Conflict

1. Create a new repository
2. Create a new file called hello.c and add the following content:

#include <stdio.h>

int main() {
  printf("Hello CS193 students!");
  return 0;
}

3. Change the line 4 (print statement) to something like "Nice to meet you..."
4. Make a commit in the local repository. It's a good time to review "add - commit" workflow. Do NOT push
5. In GitHub web interface, change the line 4 to something else (e.g. "I'm an evil coworker")
6. git status -> git pull
7. Show merge conflict, fix it, commit, and push