Semen Shestakov nfrigus

Why should text files end with a newline?

Reasons:

UNIX standard
If the last line in a file doesn't end with a newline then addition of next line affects two lines instead of one. This also pollutes diff on multiple files, so reader may wonder what has changed in a line whereas no significant change has occured.

Multiple newlines at the file end are also redundant as well as spaces at the end of line.

Commit Message Guidelines

Short (72 chars or less) summary

More detailed explanatory text. Wrap it to 72 characters. The blank
line separating the summary from the body is critical (unless you omit
the body entirely).

Write your commit message in the imperative: "Fix bug" and not "Fixed
bug" or "Fixes bug." This convention matches up with commit messages

npm rank

This gist is updated daily via cron job and lists stats for npm packages:

Top 1,000 most depended-upon packages
Top 1,000 packages with largest number of dependencies
Top 1,000 packages with highest PageRank score

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

CSS Layout Debugger

A tweet-sized debugger for visualizing your CSS layouts. Outlines every DOM element on your page a random (valid) CSS hex color.

One-line version to paste in your DevTools

Use $$ if your browser aliases it:

~ 108 byte version

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

	# Please confirm that you want to reset the MySQL passwords
	CONFIRM="n"
	echo -n "Please confirm MySQL password reset. Continue? (y/N): "
	read -n 1 CONFIRM_INPUT
	if [ -n "$CONFIRM_INPUT" ]; then
	CONFIRM=$CONFIRM_INPUT
	fi

	echo

	#!/bin/sh
	#
	# Setup a work space called `work` with two windows
	# first window has 3 panes.
	# The first pane set at 65%, split horizontally, set to api root and running vim
	# pane 2 is split at 25% and running redis-server
	# pane 3 is set to api root and bash prompt.
	# note: `api` aliased to `cd ~/path/to/work`
	#
	session="work"

	Programming Language Checklist
	by Colin McMillen, Jason Reed, and Elly Jones.

	You appear to be advocating a new:
	[ ] functional [X] imperative [ ] object-oriented [X] procedural [ ] stack-based
	[ ] "multi-paradigm" [ ] lazy [ ] eager [X] statically-typed [X] dynamically-typed
	[ ] pure [ ] impure [ ] non-hygienic [ ] visual [X] beginner-friendly
	[X] non-programmer-friendly [ ] completely incomprehensible
	programming language. Your language will not work. Here is why it will not work.