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Mobility

When the iPhone came to market, Sun Microsystems announced that there soon will be Java for the iPhone. They got stopped by Apple's licence terms, which ban both, interpreted languages and code written in other language than C, C++, Objective C and JavaScript. Lately I read in the news that Apple change the licence terms, and found a promising statement on Apple's web site, so now...
on Sep 10, 2010

Programming

Update (2012-09-24): Maven users, you can directly link this class (LGPL), as I have uploaded it into Maven Central. Simply add a dependency to: <dependency>    <groupId>eu.headcrashing.treasure-chest</groupId>    <artifactId>EnumerationsClass</artifactId>    <version>...
on Jul 4, 2010
Several APIs demand that the user is implementing the .hashCode() method. The reason is that these APIs are using hash based containers (like HashMap) to have a fast means of managing lots of objects (always comparing objects using .equals() would need endless time). There are lots of standard implementations on the web, so the question is, what performance impact the implemenation of .hashCode...
on Jan 3, 2010

Databases

In my opinion, SQL Anyhwere is the best RDBMS I can think of. I can remember when we started distributing it in Germany back in the early 1990ies, as one of the first early adopters in this country. Since then, we provided it to hundreds of enterprises, from single-person laptop-only ones to large ones spanning replicated installations crossing country borders. So call me biased in that...
on Jul 3, 2010

Research

When I attended college decades back in the early 1990ies, for students of information technology the future looked bright and safe. The cold war was over, the web was growing fastly, and thanks to the pill's baby bust it was clear that everybody able to program computers would have a safe job for livetime. While I had some experience with modems and fido net before, it actually was in...
on May 16, 2010

JSR

RESTless about RESTful These days there is much discussion about REST and HATEOAS, and many people feel urged to reinterpret what HATEOAS means or what Roy Fielding's often-cited dissertation allegedly would say in their understanding, and what HATEOAS should be implemented like therefore. While I first felt amused about this "dispute about nothing" (just ask Mr Fielding if you don't...
on Feb 14, 2010