TIL (Today I Learned)

"Byte-sized" 😏 snippets of things I learned 🤔

60 TILs 🤓 so far.

AWS

• AWS reserves five IPs per subnet - 2023-02-12
• No self-signed certificates in Cloudfront's SSL connection - 2023-02-12
• ACM certificate should always be in us-east-1 for Cloudfront - 2023-02-12

CLI

• envsubst command for substituting values in config files - 2024-07-28
• Pass Arguments From Previous Command - 2023-07-19
• Execute last command with sudo - 2023-02-13

CSS

• Select by attr in list of values - 2024-04-22

Django

• Using add_q in Django Queries - 2024-06-23
• Add Multiple Objects In Queryset In Many To Many Relationship - 2024-06-23
• Generate random secret key - 2024-06-03
• Empty database - 2023-07-08
• Use defer() to limit fields fetched from models - 2023-02-12
• Redundant all chaining in queryset - 2023-02-12

Django Extensions

• Print SQL on ORM queries - 2023-02-16

Docker

• Target in Docker Compose File - 2024-07-28
• Get rid of persistent volumes in docker compose down - 2024-06-23
• Filter list of docker containers - 2023-11-20

Git

• Revert file(s) state to one in diff branch - 2024-07-28
• git rev-parse for parsing Git revision information - 2024-04-18
• git diff --name-only for file names only - 2024-04-18
• git merge-base for common-ancestor commit - 2024-04-18
• Ignore commits in git-blame view - 2023-02-13

Github

• See git-blame for a file - 2023-02-13

Github Actions

• Understanding Permissions in GitHub Actions - 2024-10-10
• paths and paths-ignore filter for optimized Workflow run - 2024-10-10
• Enable automatic inline annotations in PR using Ruff - 2023-02-13
• Permissions for pushing to a repository - 2023-02-12

Go

• Import package without using it via underscore (_) - 2024-06-23
• Build tags in Golang - 2024-06-23

Markdown

• Markdown Alerts - 2024-07-28

Mastodon

• Sending direct message on Mastodon - 2023-02-14

NPM

• npm ci (clean install) for CI pipelines - 2024-04-03

PDF

• Remove PDF Password - 2023-03-15
• Reduce file size of PDF files - 2023-03-15

Poetry

• Editable installation for a package - 2024-04-03
• Generate requirements without hashes - 2024-04-03
• Clear cache for resolving dependencies faster - 2023-02-16

PSQL

• Restore database via template - 2024-06-23
• Dump and Restore database - 2023-07-08

Pytest

• Run tests that match substring in their name - 2024-04-03
• Autouse fixtures for common test dependencies - 2024-03-28

Python

• Expand home directory paths in pathlib.Path - 2024-06-23
• Handle CORS in a Simple HTTP Server - 2024-04-19
• Update dependencies in requirements.txt - 2023-11-18

React

• Not to use && for conditional rendering - 2023-02-12

SSH

• Setup SSH Tunneling - 2023-07-08

Terraform

• Reading directly from environment variables - 2024-09-20
• Zip Lambda code - 2024-09-06
• Lifecycle Ignore changes - 2024-07-03

Terragrunt

• Force unlock state file - 2024-09-06

VIM

• Open a file on a particular line - 2023-02-13
• Indent and De-indent lines in Vim. - 2023-02-13
• Open file on a particular pattern in file - 2023-02-13
• Use text objects to make efficient changes - 2023-02-13
• Remove lines matching a pattern - 2023-02-13

VLC

• Cast video to chromecast - 2023-02-13

Wagtail

• Get blocks in StreamBlock using blocks_by_name & first_block_by_name - 2024-04-25
• Many to Many relationship in Wagtail - 2024-04-25
• Lazily Refer Snippet in blocks - 2024-03-30

Yml

• YAML Anchor Tags using <<: and * Syntax - 2024-10-10

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Resources

This repository is inspired from the following respositories:

• Lacey Williams Henschel's TIL
• Simon Willison's TIL