Humour (121)

22 février 2017

Nerd humour



The Mathematics of Winning Monopoly

16 décembre 2016

If you’re a big Monopoly fan (and mathematics fan) like me, you’ll enjoy this video.  Not that it’s something new to me (I admit it, I’m a bit of a nerd, I once had a book dedicated solely to that subject : mathematical aspects of Monopoly!), but it could help you win more often at the game.  Besides, maths are fun!


26 août 2016

If you need to do some serious maths/statistics stuff or just number crunching, there’s plenty of tools out there.

Being a happy Smalltalker/Pharoer/VisualWorker/VisualAger/Dolphiner/Squeaker, my favorite library is PolyMath (previously known as SciSmalltalk).  Otherwise, I’m a big fan of R (mostly because of the huge amount of packages available).  Hey! That’s a long way from my nightmare days of SAS and SPSS!

Most complaints I hear about R is its inability to deal with large amounts of data and somewhat annoying syntax/style (I don’t get it!!!).

But there’s always Julia.  Give it a try!

Math blogs

7 août 2016

Looking for some cool math blogs?  Here are some I like…





What’s new?

19 juillet 2016

What’s new?

After a major data loss (I haven’t given up on getting back all my data, mostly code repositories and databases!), I had to start all my pet projects from scratch. Luckily, it’s easier second time around as they say! And, lucky me, I store all my personal stuff on the web! So here’s a list of what’s coming up on this blog.


Even though I had a decent working version of the genetic algorithm program to find the best ruzzle grid (original posts in French here, here and here), I wasn’t satisfied with the code.  It slowly evolved from a bunch of code snippets into something I could somehow call a genetic algorithm.  Problem was that my solution was tailored for this specific problem only!  Since I lost all the Smalltalk code, I redid the whole thing from scratch : better design, simpler API, more flexible framework.  I can currently solve a TSP problem, the best ruzzle grid search and a diophantine equation.

I also plan to provide examples of the 8 queens problem, the knapsack problem, a quadratic equation problem, a resource-constrained problem and a simple bit-based example with the GA framework.  Besides, the are now more selection operators, more crossover operators, more termination detectors (as well as support for sets of termination criteria!), cleaner code and the list goes on!  So I’ll soon publish a GA framework for Pharo.

As most of you know, the Rush fan in me had to pick a project name in some way related to my favorite band!  So the framework will be called Freewill, for the lyrics in the song :

Each of us
A cell of awareness
Imperfect and incomplete
Genetic blends
With uncertain ends
On a fortune hunt that’s far too fleet


A stupid quest I’ll address after the first version of my GA framework is published.  It all started with a simple question related to the game of bingo (don’t ask!) : can we estimate the number of bingo cards sold in an event based on how many numbers it takes for each card configuration to have a winner?  So it’s just a matter of generating millions of draws and cards à la Monte Carlo and averaging how many numbers it takes for every configuration.  Why am I doing that?  Just because I’m curious!


There’s been a lot of action on the Pharo side and Glorp.  I plan on having a serious look at the latest Glorp/Pharo combo and even participate to the development!


I’ll translate my articles (in French here, here and here) on the SQL sudoku solver in English and test the whole thing on the latest MySQL server.  Besides, db4free has upgraded to a new MySQL server version!


I had done a port of NeoCSV to Dolphin right before losing all my code data.  Wasn’t hard to port so I’ll redo it as soon as I reinstall Dolphin!


It’s time to reinstall VisualAge, VisualWorks, Squeak, ObjectStudio and Dolphin and see what’s new in each environment!  From what I saw, there’s a lot of new and interesting stuff on the web side.  Add to that the fact that most social media platforms have had significant changes in their respective APIs recently, so there’s a lot to learn there!


That’s a wrap folks!