---
title: "💻 Programming Notes"
url: https://stacklist.com/card/074b2076-a8a5-44e7-8599-2ddfb3f58262
stack: https://stacklist.com/stack/78f094fa-71be-4d57-8562-8614f7170afe
summary: "Programming Notes is a collection of practical code snippets and tips covering Python, JavaScript, and Git workflows. It includes useful patterns like list comprehensions, debouncing functions, and Git commands, along with a development checklist for best practices."
tags: "python, javascript, git, code-snippets, programming-tips, best-practices, development"
key_entities: "Python (technology), JavaScript (technology), Git (technology), List Comprehension (concept), Walrus Operator (concept), Debounce (concept), Optional Chaining (concept)"
classification: "notes"
content_hash: "sha256:860954829e6ff8c0e2fffc676c36348e84d7e75b55241450c7c40bcf303910f8"
acp_version: "0.2"
token_counts_approximate: 320
visibility: public
agent_accessible: true
status: "final"
---

# 💻 Programming Notes

# 💻 Programming Notes

## Python Tips

```python
# List comprehension
squares = [x ** 2 for x in range(10)]

# Dictionary comprehension
word_lengths = {word: len(word) for word in ["hello", "world"]}

# Walrus operator (Python 3.8+)
if (n := len(data)) > 10:
    print(f"Too many items: {n}")
```

### Useful Built-ins

| Function    | Description                        |
|-------------|------------------------------------|
| `enumerate` | Returns index + value pairs        |
| `zip`       | Pairs elements from multiple lists |
| `map`       | Applies a function to an iterable  |
| `filter`    | Filters elements by a condition    |

## JavaScript Snippets

```javascript
// Debounce
const debounce = (fn, delay) => {
  let timer;
  return (...args) => {
    clearTimeout(timer);
    timer = setTimeout(() => fn(...args), delay);
  };
};

// Optional chaining
const city = user?.address?.city ?? "Unknown";
```

## Git Cheatsheet

```bash
git log --oneline --graph     # Visual branch history
git stash pop                 # Re-apply last stash
git rebase -i HEAD~3          # Interactive rebase
git bisect start              # Binary search for a bug
```

## Checklist

- [ ] Write tests before refactoring
- [ ] Document all public APIs
- [ ] Audit dependencies monthly