> At Play with J is a series of articles that Eugene McDonnell wrote for > Vector magazine. There are 42 of them, and they are a treasure trove of > J. Many can be seen on the wiki at http://www.jsoftware.com/jwiki/Articles. > > The British APL Association, who publish Vector, would like to republish > the collection in book form. Unfortunately, some of the J code is > obsolete. We would like to update the code so that it works in the > latest version of J. The book would then appeal to the J novice as well > as the expert. > > I think this a worthwhile project for the J community as well as BAA, > and would like to co-opt the help of forum members. What I propose is > that all the articles are put on the wiki, and volunteers take > responsibility for updating individual articles. Once this is complete, > the BAA would use the wiki pages as source for the book. Volunteers will > be given credit in the book, but I think that assisting BAA in honoring > Eugene will be its own reward. > > The wiki page http://www.jsoftware.com/jwiki/At%20Play%20With%20J has a > table of the articles, and more information on the kind of editing that > might be required. Please take a look and see if you can help. > > Ian Clark of BAA is managing this project. Please email Ian if you need > more information, or discuss the project in the Chat forum. > > Thanks > > Chris
If notes other than related to updating J code are to be considered, I'd like to mention the following. Near the end of the article “Belgian Numbers” (http://www.vector.org.uk/archive/v221/belgium.htm), there is this paragraph, explaining why the numbers were so called: ‘Why Belgian, indeed. Well, there are Roman numbers, Arabic numbers, even Catalan numbers. It’s about time Belgium was recognized. […] Eric Angelini (the creator of these numbers) […] is Belgian.’ The text is misleading by suggesting that Catalan numbers were named after the Spanish province or the language that is being spoken in it. In fact they are named after a mathematician. What is particularly amusing is that Eugène Catalan – except being a namesake with Eugene McDonnell(!) – was … Belgian. So it is at least for the second time that Belgium gets recognised in Number theory. (In fact, the first time I saw the title “Belgian Numbers”, I thought it had to do with Catalan numbers.) Boyko ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
