EmbeddingGemma 2: an open, lightweight multimodal embedding model
deepmind.google·6d ago
AI Engineering
Lobsters·Jul 25·5 min read
A shell colon does nothing. Use it anyway
TL;DR
Using a single colon in shell scripting can simplify argument checking significantly. The null command, represented by the colon, allows for concise error handling and other useful operations.
✦ Why It Matters
Start using the null command to simplify your shell scripts and improve error handling today.
Key Takeaways
- Use : to simplify argument checks in scripts.
- Leverage parameter expansion for concise error messages.
- Utilize : for file operations like truncation.
- Incorporate null command in traps for better script control.
How It Works
The colon (:) is a built-in shell command that does nothing but evaluate its arguments. When used with parameter expansion, it can check if a variable is set and provide a custom error message if it is not.
This allows for a more concise way to handle required arguments in scripts.