Nikita Zavgorodnii nikitajz

#Note for Programming in Scala

##Chp.0 SBT & Scala Interpreter

Call scala interpreter by sbt.
```
// enter scala interpreter
```

I've done some comparisons of the methods above + RE compiled.
Python 3.7.4
I've used the book from project Gutenderg.

from urllib.request import urlopen

# Download the book Alice’s Adventures in Wonderland, by Lewis Carroll
text = urlopen('https://www.gutenberg.org/files/11/11-0.txt').read().decode('utf-8')
# Split it into the separate chapters and remove table of contents, etc

sep = 'CHAPTER'

PSQL

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)

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

Tabs and Windows

Function	Shortcut
New Tab	`⌘` + `T`
Close Tab or Window	`⌘` + `W` (same as many mac apps)
Go to Tab	`⌘` + `Number Key` (ie: `⌘2` is 2nd tab)
Go to Split Pane by Direction	`⌘` + `Option` + `Arrow Key`
Cycle iTerm Windows	`⌘` + `backtick` (true of all mac apps and works with desktops/mission control)

macOS Default Values Command Reference

Original: https://github.com/kevinSuttle/macOS-Defaults/blob/master/REFERENCE.md

chflags

change file flags

usage: chflags [-fhv] [-R [-H | -L | -P]] flags file ...

Shell Keybindings

Navigation 🚀

Keybinding	Action
`Alt` + `f/b`	Move cursor to previous/next word
`Ctrl` + `a/e`	Move cursor to beginning/end of command
`Ctrl` + `xx`	Toggle between the start of line and current cursor position

	[
	{
	"name": "Corne, default layer",
	"author": "https://github.com/c0psrul3",
	"plate": false,
	"keyboard-layout-editor": "http://www.keyboard-layout-editor.com/#/gists/adfa7c3cd8f0c6d3a7b9155c6eab1748#file-corne-crkbd_c0psrul3-default-json",
	"qmk-config": "https://config.qmk.fm/#/crkbd/rev1/LAYOUT"
	},
	[
	{

	[
	{
	"name": "corne-ish zen__main",
	"author": "nikitajz"
	},
	[
	{
	"x": 3,
	"a": 6
	},

	# Cheatsheet
	https://franzdiebold.github.io/polars-cheat-sheet/Polars_cheat_sheet.pdf

	# PyData by datenzauberai
	https://github.com/datenzauberai/PyConDE-2023--Polars-make-the-switch/blob/main/Polars%20-%20make%20the%20switch%20to%20lightning-fast%20dataframes%20-%20Versand.pdf

	# More examples
	https://github.com/martinbel/polars-tutorial/tree/master