Hacker News
- Preventing form re-submission with HTTP 303 redirects http://tumblr.jonthornton.com/post/7902581999/preventing-form-resubmission-and-http-303-redirects 27 comments
- Calculate Latitude/Longitude Distances in MySQL with the Haversine Function http://tumblr.jonthornton.com/post/1419487206/calculate-latitude-longitude-distances-in-mysql-with 29 comments