Monthly Archives: September 2010

SQL and simple polymorphism

Posted on September 25, 2010 by David Megginson

SQL is about tables and sets. Object-oriented programing is about types, subtypes, and polymorphism. There are nasty, nasty frameworks available to try to move between the two worlds (say, by serializing and deserializing Java objects) — this posting, however, is … Continue reading →

Posted in General | Tagged , , | 8 Comments

Amazon EC2 “micro instances” vs. Google App Engine

Posted on September 9, 2010 by David Megginson

A note in my inbox this morning announced that Amazon’s EC2 virtual computer hosting service now supports “micro instances” for $0.02/hour ($0.03/hour if you’re confused enough to want to host a web site using Windows): Instances of this family provide … Continue reading →

Posted in General | 8 Comments