Miyamura80 / Useful-Commands

For personal note-taking of useful commands

Useful-Commands

For personal note-taking of useful commands

Git

Standard

• New branch: git checkout -b [name_of_your_new_branch]
• List branches: git branch
• Stage files: git add <filename>
• See changes: git diff <branchname>
• Create PR: git push
• Delete branch: git branch -d <branchname>
• Commit Modified File: git commit -am "commit message"
• See modified files: git status

Merge Conflicts

• Catch up with master on a feature branch: git merge master
• Get rid of modification on file: git reset <filename>
• Undo 1 commit: git reset HEAD~1
• See commit log & hashes: git log
• Unstage but keep all changes after this hash: git reset <commithash>
  • --hard to unstage + discard changes also

NextJS Sprint

• npx create-next-app --example with-tailwindcss scrypto-bond-frontend
• git init

Python Module

• Sibling directory: 1) Single Method

  import os, sys
  currentdir = os.path.dirname(os.path.realpath(__file__))
  parentdir = os.path.dirname(currentdir)
  sys.path.append(parentdir) 

  2. Modularization: Create __init__.py in the sibling_directory with the following

  from sibling_script import sibling_method

  In the main.py do:

  from sibling_directory import sibling_method

Python set

• Add

  my_set = {1,3,5,7}
  my_set.add(8)
  my_set.remote(8)

Python DefaultDict

from collections import defaultdict
def_dict = defaultdict(<DATA_TYPE OF DEFAULT VAL>)

# Defaultdict of defaultdict
defaultdict(lambda: defaultdict(int))

Python functional

• Dictionary: Doesn't exist. Use comprehension

  my_dictionary = {k: f(v) for k, v in my_dictionary.items()}

• Filter list:

  filtered_list = filter(input_list, boolean_func)

Python Typing

• Set the same type as class in method's parameter:

  class Foo:
    def foo_method(self, other_foo: "Foo"):
        return "Hello World!"

  Using forward declarations it is evaled after the whole module is loaded, so it can evaluate to the Foo class.

Using requirements.txt with pip

• Create requirements.txt: pip freeze > requirements.txt
• Install all dependencies: pip install -r requirements.txt

Python Environment

• Use Environment:
  • Linux: source env/bin/activate
  • Windows: .\env\Scripts\activate.bat
• Anaconda:
  • conda env create -n <envName> --file requirements.txt
  • conda activate <envName>