Weera Wu wulab

This is a plain-text version of Bret Victor’s reading list. It was requested by hf on Hacker News.

Highly recommended things!

This is my five-star list. These are my favorite things in all the world.

A few of these works have had an extraordinary effect on my life or way of thinking. They get a sixth star. ★

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)

Project Title

One Paragraph of project description goes here

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.

Prerequisites

These are the Kickstarter Engineering and Data role definitions for both teams.

Technical	Data	People
Junior Software Engineer
Software Engineer	Data Analyst
Senior Software Engineer	Data Scientist	Engineering Manager
Staff Engineer	VP of Data	Engineering Director
Principal Engineer		CTO

Safest way to clean up boot partition - Ubuntu 14.04LTS-x64, Ubuntu 16.04LTS-x64

Reference

Case I: if /boot is not 100% full and apt is working

1. Check the current kernel version

$ uname -r

	require 'active_record'

	ActiveRecord::Base.logger = Logger.new(STDERR)
	ActiveRecord::Base.colorize_logging = false

	ActiveRecord::Base.establish_connection(
	:adapter => "sqlite3",
	:dbfile => ":memory:"
	)

	var swipeFunc = {
	touches : {
	"touchstart": {"x":-1, "y":-1},
	"touchmove" : {"x":-1, "y":-1},
	"touchend" : false,
	"direction" : "undetermined"
	},
	touchHandler: function(event) {
	var touch;
	if (typeof event !== 'undefined'){

	#encoding:utf-8
	#repl_client.rb
	require 'socket'
	require "pp"
	server = TCPSocket.open("localhost", 60000)
	# sleep 1000
	loop do
	print "=>"
	code=STDIN.gets
	if code.include?("exit")==true

	var scales = {
	'natural major': [0,2,4,5,7,9,11,12],
	'ionian': [0,2,4,5,7,9,11,12],
	'major': [0,2,4,5,7,9,11,12],
	'chromatic': [0,1,2,3,4,5,6,7,8,9,10,11,12],
	'spanish 8 tone': [0,1,3,4,5,6,8,10,12],
	'flamenco': [0,1,3,4,5,7,8,10,12],
	'symmetrical': [0,1,3,4,6,7,9,10,12],
	'inverted diminished': [0,1,3,4,6,7,9,10,12],
	'diminished': [0,2,3,5,6,8,9,11,12],

	local lpeg = require'lpeg'
	local P, R, S = lpeg.P, lpeg.R, lpeg.S --patterns
	local C, Ct = lpeg.C, lpeg.Ct --capture
	local V = lpeg.V --variable

	local parser = P {
	'program', -- initial rule
	program = Ct(V'sexpr' ^ 0),
	wspace = S' \n\r\t' ^ 0,
	atom = V'boolean' + V'integer' + V'string' + V'symbol',