Stanley Zheng qwo

Rails 2.3.5 on App Engine (DataMapper)¶ ↑

Do not use rvm (or install and run from JRuby). The google-appengine gem must install into your system MRI. The appengine-sdk gem includes a complete Java app server. We bootstrap Java from MRI, then your app runs inside a servlet container (with access to all the APIs) using the version of JRuby installed into each app.

We assumed Rails 2 would never work without rubygems, and we committed to gem bunlder for JRuby on App Engine, so we were waiting for Rails 3. Fortunately, Takeru Sasaki was able to patch the Rails 2.3.x calls to rubygems, and now we have it working. Rails 2.3.x currently spins up several seconds faster than Rails 3, and just a few seconds behind Sinatra.

See the TInyDS version also: gist.github.com/gists/269075

Install the Development Environment¶ ↑

Sublime Text 2 – Useful Shortcuts (PC)

Loosely ordered with the commands I use most towards the top. Sublime also offer full documentation.

Editing

Ctrl+C	copy current line (if no selection)
Ctrl+X	cut current line (if no selection)
Ctrl+⇧+K	delete line
Ctrl+↩	insert line after

Sass/Less Comparison

In this document I am using Sass's SCSS syntax. You can choose to use the indented syntax in sass, if you prefer it, it has no functional differences from the SCSS syntax.

For Less, I'm using the JavaScript version because this is what they suggest on the website. The ruby version may be different.

Variables

This shows how to send messages to a connected Tessel over USB and how to log messages that the Tessel writes to console.log().

You'll need to do a tessel push tessel-code.js to push the script to the Tessel first as it seems you can only have one connection at a time (unless there's another way I'm not aware of).

Then run node host-code.js to send the message to Tessel. You should see Tessel log back the message it received.

	#include <iostream>

	using namespace std;

	class Node
	{
	public:
	int data;
	Node *next;

	import java.util.Random;

	/**
	* A credit card number generator.
	*
	* @author Josef Galea
	*/
	public class CreditCardNumberGenerator {

	private Random random = new Random(System.currentTimeMillis());

	<!DOCTYPE html>
	<html>
	<head>
	<title>Force-Directed Layout</title>
	<script type="text/javascript" src="http://mbostock.github.com/d3/d3.js?1.29.1"></script>
	<script type="text/javascript" src="http://mbostock.github.com/d3/d3.geom.js?1.29.1"></script>
	<script type="text/javascript" src="http://mbostock.github.com/d3/d3.layout.js?1.29.1"></script>
	<style type="text/css">

	circle {

	var Box2D = require('box2dweb-commonjs').Box2D
	var vkey = require('vkey')
	var raf = require('raf')

	var b2BodyDef = Box2D.Dynamics.b2BodyDef
	var b2Body = Box2D.Dynamics.b2Body
	var b2FixtureDef = Box2D.Dynamics.b2FixtureDef
	var b2World = Box2D.Dynamics.b2World
	var b2CircleShape = Box2D.Collision.Shapes.b2CircleShape
	var b2DebugDraw = Box2D.Dynamics.b2DebugDraw

	var request = require('request')
	//test

	/**
	* Handle multiple requests at once
	* @param urls [array]
	* @param callback [function]
	* @requires request module for node ( https://github.com/mikeal/request )
	*/
	var __request = function (urls, callback) {

	var dom = Bloop.dom;

	var Box = Bloop.createClass({
	getInitialState: function() {
	return { number: 0 };
	},

	updateNumber: function() {
	this.state.number++;
	},