LeoTM leotm

Moving from jQuery

Events

// jQuery
$(document).ready(function() {
  // code
})

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

Learn JavaScript concepts with the Chrome DevTools

Authored by Peter Rybin , Chrome DevTools team

In this short guide we'll review some new Chrome DevTools features for "function scope" and "internal properties" by exploring some base JavaScript language concepts.

Closures

Let's start with closures – one of the most famous things in JS. A closure is a function, that uses variables from outside. See an example:

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)

	echo 'export PATH=$HOME/local/bin:$PATH' >> ~/.bashrc
	. ~/.bashrc
	mkdir ~/local
	mkdir ~/node-latest-install
	cd ~/node-latest-install
	curl http://nodejs.org/dist/node-latest.tar.gz \| tar xz --strip-components=1
	./configure --prefix=~/local
	make install # ok, fine, this step probably takes more than 30 seconds...
	curl https://www.npmjs.org/install.sh \| sh

	<?php

	// Use in the "Post-Receive URLs" section of your GitHub repo.

	if ( $_POST['payload'] ) {
	shell_exec( 'cd /srv/www/git-repo/ && git reset --hard HEAD && git pull' );
	}

	?>hi

	https://www.pivotaltracker.com/help/api?version=v3#github_hooks
	https://www.pivotaltracker.com/help/api?version=v3#scm_post_commit_message_syntax

	SCM Post-Commit Message Syntax

	To associate an SCM commit with a specific Tracker story, you must include a special syntax in the commit message to indicate one or more story IDs and (optionally) a state change for the story. Your commit message should have square brackets containing a hash mark followed by the story ID. If a story was not already started (it was in the "not started" state), a commit message will automatically start it. For example, if Scotty uses the following message when committing SCM revision 54321:

	[#12345677 #12345678] Diverting power from warp drive to torpedoes.

	i386 : iPhone Simulator
	x86_64 : iPhone Simulator
	arm64 : iPhone Simulator
	iPhone1,1 : iPhone
	iPhone1,2 : iPhone 3G
	iPhone2,1 : iPhone 3GS
	iPhone3,1 : iPhone 4
	iPhone3,2 : iPhone 4 GSM Rev A
	iPhone3,3 : iPhone 4 CDMA
	iPhone4,1 : iPhone 4S

	# Truly the most ridiculous thing I could think of.

	doInstall <- TRUE # Change to FALSE if you don't want packages installed.
	toInstall <- c("XML", "png", "devtools", "RCurl")
	if(doInstall){install.packages(toInstall, repos = "http://cran.r-project.org")}
	lapply(toInstall, library, character.only = TRUE)

	# Some helper functions, lineFinder and makeTable
	source_gist("818983")
	source_gist("818986")

	<?php


	ignore_user_abort(true);


	function syscall ($cmd, $cwd) {
	$descriptorspec = array(
	1 => array('pipe', 'w'), // stdout is a pipe that the child will write to
	2 => array('pipe', 'w') // stderr