Author Archives: lorg

Pyweb-il Presentation on Optimization Slides

Posted on March 26, 2010 by lorg

Last Monday I gave a presentation in pywebil on optimization, that’s loosely based on my blog post on the same subject. Here are the slides for that presentation.

Share|
Posted in Optimization, Programming, Python | Tagged , , , | Leave a comment

Javascript Element Creator

Posted on March 17, 2010 by lorg

Some time ago I was working on optimizing the client side code of my website, plnnr.com, an online trip planner. This website does automatic trip planning, and the problem was that recalculating trips was slow. After profiling, I found out … Continue reading →

Share|
Posted in Javascript, Optimization, Programming, Projects, startup, web-design | Tagged , , , | 2 Comments

Call for Volunteers: Open Knesset – oknesset.org

Posted on March 11, 2010 by lorg

Over the last few weeks, I’ve been lightly involved in work on open knesset. Mostly I’ve been helping two of the main developers, Benny and Ofri, and joining the discussions on the discussion group. (For the non-Israelis: the Knesset is … Continue reading →

Share|
Posted in Projects | Tagged , , , | 2 Comments

Ethics in Programming

Posted on March 8, 2010 by lorg

Some time ago I was bothered by the issue of ethics in programming. I heard the question best raised during a “game unconference” I attended. There was a panel about monetary systems for games, and people talked about the issues … Continue reading →

Share|
Posted in Programming, Programming Philosophy | Tagged , | 7 Comments

Simple SQLObject DB Migration how-to

Posted on March 3, 2010 by lorg

I’ve been using sqlobject for plnnr.com for quite some time now. So far my experience with it has been positive. Although I’ll probably change ORM when I move to django, for now it stays. While it stays, I need to … Continue reading →

Share|
Posted in Programming, Python | Tagged , , , | Leave a comment

The mathematics behind the solution for Challenge No. 5

Posted on February 26, 2010 by lorg

If you take a look at the various solutions people proposed for the last challenge of generating a specific permutation, you’ll see that they are very similar. Most of them are based on some form of div-mod usage. The reason … Continue reading →

Share|
Posted in Challenges, computer science, Programming, Python | Tagged , , , , | Leave a comment

Small Programming Challenge no. 5 – Generating a Permutation

Posted on November 11, 2009 by lorg

I thought of this one quite a long time ago, and I believe that the idea behind it is pretty nice mathematically. I got the idea for it from Knuth’s “The Art of Computer Programming”. The challenge is simple: write … Continue reading →

Share|
Posted in Challenges, computer science, Programming | Tagged , | 15 Comments

And now for something completely different

Posted on November 10, 2009 by lorg

My friend Yuval whom you might already know from the comments here, apparently composed music for the Python Zen. It made me laugh today, and as it’s been a long day, I thought it’s worth sharing here. Especially as it … Continue reading →

Share|
Posted in Humour, Python | Tagged , , , | Leave a comment

Leaky method references

Posted on November 4, 2009 by lorg

After reading my last post regarding __del__, you should know that __del__ + reference cycle = leak. Let’s say that you do need to use __del__, so you decide to avoid reference cycles. You write your code in such a … Continue reading →

Share|
Posted in Python | Tagged , , , , | Leave a comment

Python Gotchas No. 2: Garbage Collection Oddities

Posted on October 30, 2009 by lorg

Python is a garbage collected language. The garbage collector will collect orphaned objects. These are objects that have no references. If an object has a __del__ method, it will be called when that object is collected. Note however, that there … Continue reading →

Share|
Posted in Programming, Python | Tagged , , , | 1 Comment