Tony Fast tonyfast

Asynchronous programming with Tornado

Asynchronous programming can be tricky for beginners, therefore I think it's useful to iron some basic concepts to avoid common pitfalls.

For an explanation about generic asynchronous programming, I recommend you one of the [many][2] [resources][3] [online][4].

I will focus on solely on asynchronous programming in [Tornado][1]. From Tornado's homepage:

Collections

each(array)

Underscore example:

_.each([1, 2, 3], function(num) { alert(num); });

A D3 demonstration of SVG and Canvas intermingling. Blue circles are plotted in SVG, black circles in canvas. One force to rule them all. The plot is zoomable and pannable.

Inspired by M. Bostock's Canvas / SVG zoom comparison series and collision detection examples [1] [2] .

	/*
	* This is an example build file that demonstrates how to use the build system for
	* require.js.
	*
	* copied from here: https://github.com/jrburke/r.js/blob/master/build/example.build.js
	* THIS BUILD FILE WILL NOT WORK. It is referencing paths that probably
	* do not exist on your machine. Just use it as a guide.
	*
	*
	*/

	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>
	body {
	font:12px/20px 'Helvetica';
	}
	textarea, input {
	width:100%;
	height:20px;
	margin:0;

	#! /usr/local/bin/python3
	""" Requirements: s3cmd, jekyll, gzip & sass.

	Mk 2 of the script

	To use this script, you'll need to edit your site's _config.yml file and add the following:

	s3bucket: s3://bucket-name

	Remember: Change the path_to_sass_file & sass_compile_path variables if you want to compile sass files. If you don't want to compile sass files, comment out the call to the compile_sass() function.

	var svg = document.getElementById('graph'),
	xml = new XMLSerializer().serializeToString(svg),
	data = "data:image/svg+xml;base64," + btoa(xml),
	img = new Image()

	img.setAttribute('src', data)
	document.body.appendChild(img)

	license: gpl-3.0
	height: 480
	redirect: https://beta.observablehq.com/@mbostock/d3-equirectangular

	license: gpl-3.0
	redirect: https://observablehq.com/@d3/selection-join