til

Things I’ve learned, collected in fabge/til.

aws

• Assume a role across AWS accounts
• AWS SigV4 using curl
• CloudFormation default values
• CloudTrail
• Access AWS resources from Azure without credentials
• DynamoDB Global Secondary Indexes
• DynamoDB table scan
• Display EC2 instance costs per month
• Lambda logging
• Pagination using AWS boto3
• Reference AWS account
• Have pretty URLs when using S3 and CloudFront
• Search CloudWatch logs
• Step Function Monitoring

azure

• Azure functions
• az login
• Azure portal tenant url
• Find Azure Tenant Id by Subscription Id
• Set up Databricks via Bicep
• Databricks authentication with Azure
• Enterprise application
• Find permissions in RBAC roles easily
• Entra ID
• Invoke the Azure API via HTTP endpoints

azure-devops

• Change workingDirectory for AWSShellScript
• Contribute from a pipeline
• Remove Azure DevOps Retention Leases

bash

• Modern PATH environment variable
• Bash snippets
• Run bash script in specific directory
• Do some action when changing directory (cd)
• Escaping strings in Bash using !:q
• nvim
• Replace variables
• set -euo pipefail
• Tmux
• Vim

browser

• Make a website fully editable with document.designMode
• Take screenshots right from the browser

cloudflare

• ERR_TOO_MANY_REDIRECTS

css

• Border around every element using CSS selector
• How to center

django

• Django admin
• Django apps
• Django forms
• Django general
• Django models
• Django queries
• Safely Pass Data to JavaScript in a Django Template
• Django tests
• Django urls
• Django User

git

• Write proper commit messages
• Using Multiple SSH Keys
• safer alternative to git push –force
• fatal: Need to specify how to reconcile divergent branches
• Reference commits using the commit message
• Rename branch
• Revert commit
• Squash/rebase commits

github

• Commit a file if it changed
• Debug GitHub Actions
• Download latest release
• Skip CI

html

• full height
• Non-breaking space

htmx

• Loading button

img

• Shrink/reduce/compress image sizes

javascript

• Run async function on top level
• Deno Jupyter
• Subsetting/slicing lists
• Print current year
• Pythonic Javascript

json

• Pretty-print JSON blobs

linux

• Get sizes of folder in current directory

llm

• Pipe code and let explain
• Prompt engineering
• Summarize websites

macos

• MacOS shortcuts

misc

• Comments
• Database Fields
• Exceptions
• Greppability
• Idempotence
• loops and variable names
• XY Problem

pytest

• How to cheat at unit tests

python

• Align string output with f-strings
• async
• Datetime formats
• Python debugger
• defaultdict
• Functions
• Generators
• Jupyter notebook commands
• Using lambda
• Python miscellanea
• Modules and Packages
• Monkey Patching
• nbdev
• Pandas
• Parallel HTTP requests in Python
• pdb interact command
• pip install while developing
• Useful regex patterns
• Using repr
• uv - single file scripts
• Scope of variables
• Virtual environment setup
• Walrus Operator

sqlite

• Setup

ssh

• Setup SSH keys via ssh-copy-id

terraform

• Loop files

ubuntu

• Linux file system

vscode

• VS Code shortcuts
• VS Code workspace settings

zsh

• zsh goodies