TILs - Fueling Curiosity, One Insight at a Time

$stdout.sync = true

this helps if you are trying to write a tool which pipes to another command. the other command will be able to process the output immediately, as no buffer and periodic flush is involved.
eg. cat rules > ruby rule_engine.rb | python calculate_tax.py

Also ARGF, sort of like a streaming STDIN. pretty cool, cause of the streaming.

git subtree push --prefix heroku master for pushing a subfolder to heroku [https://stackoverflow.com/q/39197334/6220432]

Dark and light themes for browsers can be controlled programmatically using css. More info can be found here https://developer.mozilla.org/en-US/docs/Web/CSS/@media/prefers-color-scheme

revive stuck terminals : eg - In case you loose your ssh connection and your terminal is stuck, but would like to continue on the same terminal without closing it.

https://what-problem-does-it-solve.com/ Yesterday I came across this. Seems like a good way to reason about webpack, serverless, and blockchains 🙂

In ActiveRecord when using default scope filters, be careful in left_joins queries. As the scope would show up the join on clause.