Dmitry Pashkevich dpashkevich

Some random notes on the pangs of ember. Will be expanding as they are uncovered.

Building a form

Say you have a form that maps to a model, something like:

<form>
  <fieldset>
    <legend>Who are you?</legend>

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

Node.js - npm Cheat Sheet

(Full description and list of commands at - https://npmjs.org/doc/index.html)

List of less common (however useful) NPM commands

Prepand ./bin to your $PATH

Make sure to export your local $PATH and prepand relative ./node_modules/.bin/:

the main caveat is that each case function will be executed until a match is found, however, this would not be any different from doing the same thing using if/else.

note: i am not advocating this method, it's just something i've never seen done before and thought it was interesting enough to share.

#Introduction

Developing Chrome Extensions is REALLY fun if you are a Front End engineer. If you, however, struggle with visualizing the architecture of an application, then developing a Chrome Extension is going to bite your butt multiple times due the amount of excessive components the extension works with. Here are some pointers in how to start, what problems I encounter and how to avoid them.

Note: I'm not covering chrome package apps, which although similar, work in a different way. I also won't cover the page options api neither the new brand event pages. What I explain covers most basic chrome applications and should be enough to get you started.

SSH/Readline cheatsheet

Under Emacs mode, typically the default for most shells.

Ctrl + B

Basic moves
Move back one character

	{
	// --------------------------------------------------------------------
	// JSHint Configuration, Strict Edition
	// --------------------------------------------------------------------
	//
	// This is a options template for [JSHint][1], using [JSHint example][2]
	// and [Ory Band's example][3] as basis and setting config values to
	// be most strict:
	//
	// * set all enforcing options to true

	<?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

	/*
	#ie10 will only be red in MSIE 10,
	both in high contrast (display setting) and default mode
	*/

	@media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {
	#ie10 { color: red; }
	}

	/*
	* Takes provided URL passed as argument and make screenshots of this page with several viewport sizes.
	* These viewport sizes are arbitrary, taken from iPhone & iPad specs, modify the array as needed
	*
	* Usage:
	* $ casperjs screenshots.js http://example.com
	*/

	var casper = require("casper").create();