Image Similarity Search Wanted

I’ve been working on a few projects in my spare time and one service, in particular, would greatly benefit from a high quality image similarity search. I’ve been trying a number of the Open (and non-Open) Source tools (a great list of which is on Wikipedia here). Thus far none of the tools that I’ve […]

38 Comments · Posted: February 13th, 2012

JavaScript as a First Language

At Khan Academy we’ve been investigating teaching Computer Science to students in some new and interesting ways. The most interesting aspect of which is that we’re likely going to be teaching them JavaScript as their first language. We’re in a very unique position as we’re primarily aiming to teach students who’ve been through our previous […]

82 Comments · Posted: December 21st, 2011

Khan Exercise Rewrite

Today we’re pushing live a complete rewrite of the Khan Academy Exercise framework (live demo). A big push at Khan Academy has been to write more-and-more exercises for students to practice with. Naturally, to increase the number of exercises that we have, we needed to make it easier for team members, and casual committers, to […]

23 Comments · Posted: July 28th, 2011

Random Khan Exercises

We’re taking an innovative new approach to providing students with exercises in the new Khan Academy exercise framework (which will be released for beta testing soon). In the old framework a problem would be randomly generated and provided to the user. This would result in a near-infinite number of randomly generated problems. This ends up […]

8 Comments · Posted: July 19th, 2011

jQuery 1.6 and .attr()

jQuery 1.6 and 1.6.1 are out the door. Congrats to the team and everyone that was involved with the release! A relatively controversial change in 1.6 was regarding how attributes and DOM object properties were handled. In 1.6 we wanted to take the major step of completely separating the two, allowing us to create an […]

41 Comments · Posted: May 13th, 2011

Next Steps in 2011

Today I’m announcing a major change in my life: I’m leaving Mozilla Corporation and joining Khan Academy. I joined the Mozilla Corporation in January of 2007, just over 4+ years ago, as a JavaScript Evangelist. During my time at the company I had an amazing opportunity to promote JavaScript. It’s been an incredible experience working […]

144 Comments · Posted: May 3rd, 2011

Pulley: Easy Github Pull Request Landing

I’ve created a simple tool for landing pull requests from Github, which I’m calling “Pulley“. Landing a pull request from Github can be annoying. You can follow the instructions provided by Github (pulling the code, doing a merge) but that’ll result in a messy commit stream and external ticket trackers that don’t automatically close tickets. […]

17 Comments · Posted: April 21st, 2011

Revised JavaScript Dictionary Search

After my two previous posts discussing dictionary lookups in JavaScript and JavaScript Trie performance analysis even more excellent feedback came in from everyone. Out of all the results two techniques seemed to be most interesting – and promising for reducing general memory usage and load time. String-based Binary Search The first technique proposed was left […]

24 Comments · Posted: March 22nd, 2011

Next entries » · « Previous entries
Secrets of the JavaScript Ninja

Secrets of the JS Ninja

Secret techniques of top JavaScript programmers. Published by Manning.

Ukiyo-e Database and Search

Japanese woodblock print database and search engine.

John Resig Twitter Updates


Infrequent, short, updates and links.