Dave Kozma dkozma

Doing import std_msgs.msg.String or from std_msgs.msg import String imports a generated Python class.

Type support

The typesupport for the String type exists on a metaclass: String.__class__._TYPE_SUPPORT. This value starts as None. It later becomes a pycapsule (with no name) when someone calls String.__class__.__import_type_support__(). This is done in rclpy by check_for_type_support(msg_type). It's called by the Node in create_...(). Afterwards inside C code the function rclpy_common_get_type_support(pymsg_type). blindly assumes _TYPE_SUPPORT is a pycapsule.

optimize GLTF file

This optimizes a GLTF file that was exported by blender (or similar) by de-duplicating buffer views (i.e. chunks of bytes) that are equal and removing redundant accessors.

For example, 100 cubes of different scales/materials/rotations/etc should all end up using a single BufferGeometry in ThreeJS, which isn't the case with current GLTF exporters in Blender and parsers for ThreeJS.

In scenes with a lot of instancing, it can dramatically reduce total file size as well as render performance. In one test scene:

Before: 4.8MB file size, 832 THREE.Geometry instances across 832 THREE.Mesh objects
After: 661KB file size, 13 THREE.Geometry instances across 832 THREE.Mesh objects

Videos

Introduction to Functional Programming Johannes Weiß - https://vimeo.com/100786088
ReactiveCocoa at MobiDevDay Andrew Sardone - https://vimeo.com/65637501
The Future Of ReactiveCocoa Justin Spahr-Summers - https://www.youtube.com/watch?v=ICNjRS2X8WM
Enemy of the State Justin Spahr-Summers - https://www.youtube.com/watch?v=7AqXBuJOJkY
WWDC 2014 Session 229 - Advanced iOS Application Architecture and Patterns Andy Matuschak - https://developer.apple.com/videos/play/wwdc2014/229/
Functioning as a Functionalist Andy Matuschak - https://www.youtube.com/watch?v=rJosPrqBqrA
Controlling Complexity in Swift Andy Matuschak - https://realm.io/news/andy-matuschak-controlling-complexity/

CSS Layout Debugger

A tweet-sized debugger for visualizing your CSS layouts. Outlines every DOM element on your page a random (valid) CSS hex color.

One-line version to paste in your DevTools

Use $$ if your browser aliases it:

~ 108 byte version

	import Photos

	struct UnexpectedNilError: Error {}

	extension PHImageManager {
	func requestImage(
	for asset: PHAsset,
	targetSize: CGSize,
	contentMode: PHImageContentMode,
	options: PHImageRequestOptions?

	function run(input, parameters) {
	const appNames = [];
	const skipAppNames = [];
	const verbose = true;

	const scriptName = 'close_notifications_applescript';

	const CLEAR_ALL_ACTION = 'Clear All';
	const CLEAR_ALL_ACTION_TOP = 'Clear';
	const CLOSE_ACTION = 'Close';

	#![allow(non_snake_case)]
	#![allow(dead_code)]
	// port of:
	// Creating and Printing a TypeScript AST
	// https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#creating-and-printing-a-typescript-ast

	extern crate typescript_ts as ts;
	extern crate chakracore;
	use chakracore::context::ContextGuard;

	# One liner
	wget --recursive --page-requisites --adjust-extension --span-hosts --convert-links --restrict-file-names=windows --domains yoursite.com --no-parent yoursite.com

	# Explained
	wget \
	--recursive \ # Download the whole site.
	--page-requisites \ # Get all assets/elements (CSS/JS/images).
	--adjust-extension \ # Save files with .html on the end.
	--span-hosts \ # Include necessary assets from offsite as well.
	--convert-links \ # Update links to still work in the static version.

	#!/bin/bash
	#####################################################
	# Name: Bash CheatSheet for Mac OSX
	#
	# A little overlook of the Bash basics
	#
	# Usage:
	#
	# Author: J. Le Coupanec
	# Date: 2014/11/04

	height: 600
	license: mit
	acknowledgement: Please add "Nadieh Bremer \| Visual Cinnamon" to your credit when re-using this code, thank you!