I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!
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//------------------------------------------------------------- | |
// | |
// Hypothesis: | |
// | |
// Promises/A is a Monad | |
// | |
// To be a Monad, it must provide at least: | |
// - A unit (aka return or mreturn) operation that creates a corresponding | |
// monadic value from a non-monadic value. | |
// - A bind operation that applies a function to a monadic value |
Magic words:
psql -U postgres
Some interesting flags (to see all, use -h
or --help
depending on your psql version):
-E
: will describe the underlaying queries of the\
commands (cool for learning!)-l
: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)
- If you don't already have one, create a GitHub account
- Use the "Fork" button to fork the repository: