Christian Heilmann

Author Archive

Introduction to hacking at Georgia Tech

Wednesday, March 4th, 2009

I’m right now in Atlanta, Georgia and Georgia Tech for University Hack Day. Yesterday night I kicked off the one week event as my colleagues from California were delayed because of the snow situation in the US.

The presentation covers the history of hack in Yahoo, what makes a good and interesting hack and goes into explaining some of the technologies that people can use.

[slideshare id=1097476&doc=1097476]

Some people complained that the PDF is not readable on a PC, so here’s a powerpoint version of the same talk.

TTMMHTM: Mobile accessibility, Origami, naughty Sesame Street, Flickr with Video and YQL step by step

Tuesday, March 3rd, 2009

Things that made me happy this morning (Atlanta, GA, 6am – jetlag anyone?)

TTMMHTM: Truth about social networks, crayon pixels, JSONview and wireless electricity!

Saturday, February 28th, 2009

Things that made me happy this morning:

the truth about twitter according to venturebeat

Don’t use window.sun or function sun() in Firefox – lest you want to start Java!

Friday, February 27th, 2009

I just came across a mind-boggling “ghost in the machine” style problem in Firefox: if you use window.sun or function sun() in JavaScript you effectively start the Java VM. As explained in this article on doctype

There are a few “magic” properties on Mozilla’s DOMWindow interface for supporting LiveConnect that will initialize the Java plugin and all the baggage that comes with it (which, with modern Java plugins, means launching java.exe as a subprocess). Looking up these properties on the window object is all it takes.

Other properties to avoid are:

  • java
  • Packages
  • netscape
  • sun
  • JavaClass
  • JavaArray
  • JavaMember

So if you want to make sure that the performance of your webapp doesn’t go down the tubes makes sure you avoid any of these.

TTMMHTM: Minifig business card, Mozilla community guide, mental office, and Ant scripts

Thursday, February 26th, 2009

Things that made me happy this morning:

Spaceman meets people in the 50ies and tells them about Twitter