til

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

aws

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

azure

• Find permissions in RBAC roles easily
• Restrict your Microsoft Entra app to a set of users in a Microsoft Entra tenant
• az-104
• Azure functions
• Invoke the Azure API via HTTP endpoints
• Entra ID
• Databricks authentication with Azure
• Enterprise application
• Azure portal tenant url
• Set up Databricks via Bicep
• Find Azure Tenant Id by Subscription Id
• az login

azure-devops

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

bash

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

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

deno

• Deno Jupyter

django

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

git

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

github

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

html

• full height
• Non-breaking space

htmx

• Loading button

img

• Shrink/reduce/compress image sizes

javascript

• Subsetting/slicing lists
• Run async function on top level
• Print current year
• Pythonic Javascript
• Write Javascript/Node in a notebook

json

• Pretty-print JSON blobs

linux

• Get sizes of folder in current directory

llm

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

macos

• MacOS shortcuts

misc

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

pytest

• How to cheat at unit tests

python

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

regex

• Useful regex patterns

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