New

The latest blog posts to take off on Hacker News. 1,420 posts.

Any topic
2009
1119

P.S.: The Best of Intentions

Operations in Lisp, Scheme, and other dynamically-typed languages typically dispatch on representational type information rather than intentional type information. Several broad classes of bugs and confusions can be traced to improper attempts to recover intentional type information from representation types.

1124

Why Reddit uses Python

During Steve Huffman’s and Alexis Ohanian’s Pycon Keynote , someone asked why Reddit was moved from Lisp to Python . The reason for moving wasn’t too interesting, but why they have stayed is. Steve gave two “huge” reasons Reddit continues to use Python:

1133

Facebook's photo storage rewrite

This week Facebook will complete its roll-out of a new photo storage system designed to reduce the social network's reliance on expensive proprietary solutions from NetApp and Akamai. The new large blob storage system, named Haystack, is a custom-built file system solution for the over 850 million photos uploaded to…

1138

Undergraduation

March 2005 (Parts of this essay began as replies to students who wrote to me with questions.) Recently I've had several emails from computer science undergrads asking what to do in college. I might not be the best source of advice, because I was a philosophy major in college. But I took so many CS classes that most CS…

1140

The problems with url shorteners

URL shortening services have been around for a number of years . Their original purpose was to prevent cumbersome URLs from getting fragmented by broken email clients that felt the need to wrap everything to an 80 column screen. Addendum: They're useful in print , too. But it's 2009 now, and this problem no longer…