In this post I'll try to explain how Hacker News ranking algorithm works and how you can reuse it in your own applications. It's a very simple ranking algorithm and works surprising well when you want to highlight hot or new stuff. Digging into news.arc code Hacker News is implemented in Arc, a Lisp dialect coded by Paul Graham. Hacker News is opensource and the code can be found at arclanguage.or
"We were after the C++ programmers. We managed to drag a lot of them about halfway to Lisp." - Guy Steele, co-author of the Java spec In the software business there is an ongoing struggle between the pointy-headed academics, and another equally formidable force, the pointy-haired bosses. Everyone knows who the pointy-haired boss is, right? I think most people in the technology world not only recog
**************************I tried my setup on Ubuntu 13.10 server and had some issues so I decided to update this article, unfortunately I dont have the time to rewrite it so I am just hacking the bits that where issues on Ubuntu 13.10********************** So you want your own lisp web server to hack away at but where do you start? Well don’t despair, what follows is a recipe for getting such a s
This tutorial is based on the Kawa - Scheme Language Framework developed by Per Bothner. Kawa Scheme is used by Google's AppInventor framework. However Appinventor only allows you to develop using a visual interface. The tutorials here will show you how to develop Android Apps by writing code in Scheme. So let us jump into it straight away. Here is the source code for a simple app that will displa
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