Balázs Orbán orbanbalage

JavaScript function hoisting by example

Below are many examples of function hoisting behavior in JavaScript. Ones marked as works successfuly print 'hi!' without errors.

To play around with these examples (recommended) clone them with git and execute them with e.g. node a.js

Notes on hoisting

(I may be using incorrect terms below, please forgive me)

Installing PDFtk Server edittion on your Mac

This workaround install is necessary because PDFtk was pulled from homebrew-cask due to issues with it aggressively overwriting file permissions that could impact other installed libraries. See this homebrew-cask issue.

The following steps worked on Mac OS X 10.10.1 with a standard brew installation for the PDFtk Mac OS X server libary version 2.02.

All Terminal commands separated by a full line space. Some commands wrap into multiple lines.

Download and extract the Mac OS X server install pacakge

ABOUT

about:config settings to harden the Firefox browser. Privacy and performance enhancements.
To change these settings type 'about:config' in the url bar. Then search the setting you would like to change and modify the value. Some settings may break certain websites from functioning and rendering normally. Some settings may also make firefox unstable. I am not liable for any damages/loss of data.

Not all these changes are necessary and will be dependent upon your usage and hardware. Do some research on settings if you don't understand what they do. These settings are best combined with your standard privacy extensions (~~HTTPS Everywhere~~ No longer required: Enable HTTPS-Only Mode, NoScript/Request Policy, uBlock origin, agent spoofing, ~~Privacy Badger~~ etc), and all plugins set to "Ask To Activate".

	javascript:(function(){
	// parseUri 1.2.2
	// (c) Steven Levithan <stevenlevithan.com>
	// MIT License

	function parseUri (str) {
	var o = parseUri.options,
	m = o.parser[o.strictMode ? "strict" : "loose"].exec(str),
	uri = {},
	i = 14;

	#!/bin/bash

	mkdir -p ~/.ssh

	# generate new personal ed25519 ssh keys
	ssh-keygen -o -a 100 -t ed25519 -f ~/.ssh/id_ed25519 -C "rob thijssen <rthijssen@gmail.com>"
	ssh-keygen -o -a 100 -t ed25519 -f ~/.ssh/id_robtn -C "rob thijssen <rob@rob.tn>"

	# generate new host cert authority (host_ca) ed25519 ssh key
	# used for signing host keys and creating host certs

	// XPath CheatSheet
	// To test XPath in your Chrome Debugger: $x('/html/body')
	// http://www.jittuu.com/2012/2/14/Testing-XPath-In-Chrome/


	// 0. XPath Examples.
	// More: http://xpath.alephzarro.com/content/cheatsheet.html


	'//hr[@class="edge" and position()=1]' // every first hr of 'edge' class

	<?
	/////////////////////
	// slack2html
	// by @levelsio
	/////////////////////
	//
	/////////////////////
	// WHAT DOES THIS DO?
	/////////////////////
	//

	gs -dNOPAUSE -dBATCH -sDEVICE=nullpage valid.pdf
	GPL Ghostscript 9.16 (2015-03-30)
	Copyright (C) 2015 Artifex Software, Inc. All rights reserved.
	This software comes with NO WARRANTY: see the file PUBLIC for details.
	Processing pages 1 through 1.
	Page 1

	(return code 0)

	: gs -dNOPAUSE -dBATCH -sDEVICE=nullpage invalid.pdf

	<!DOCTYPE html>
	<html>

	<head>
	<meta charset="utf-8">
	<title></title>
	<meta name="author" content="">
	<meta name="description" content="">
	<meta name="viewport" content="width=device-width, initial-scale=1">

	$UpdateSession = New-Object -ComObject Microsoft.Update.Session
	$UpdateSearcher = $UpdateSession.CreateupdateSearcher()
	$Updates = @($UpdateSearcher.Search("IsHidden=0 and IsInstalled=0").Updates)
	$Updates \| Select-Object Title