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It seems that when we develop a trait (that includes both abstract and concrete methods) in Scala and compile it, the outcome includes two jave byte code files. The first includes the definition of an interface with an identical name to the one we gave our trait. The abstract methods that interface includes are the same methods defined in our trait. The other file includes the definition of a...
on Oct 16, 2010
The Facebook platform has significantly changed during the last year. The three most important changes were the emergence of the Facebook Graph API, the Facebook JavaScript SDK and the Facebook Social Plugins. For each one of these three topics I chose to develop a professional course. These courses are available at The community version is available for free personal and...
on Oct 13, 2010
I have recently finished teaching a Java EE course in Tsofen. Tsofen is a non profit organization that provides professional training courses in advance software development areas (such as .NET and Java EE) to arabs and druzes who live in Israel and assist them with finding a job in israeli high tech companies. The cruel reality during the years has led to discrepancy and to an abnormal situation...
on Oct 2, 2010
My first experience with software development took place when I was 12 years old. I can still recall my mom taking me to my first software programming course. The year was 1982. I was still a child. The course took place in De-Shalit high school (Rehovot, Israel) in a class equipped with big black and white TVs connected with Sinclair ZX-81, the first personal computer in the world, equipped with...
on Sep 12, 2010


My name is Haim Michael, I am the General Manager for Zindell Technologies and I am an eternal student and a lecturer. I chose to develop the abelski web site for the benefit of all people world wide. I have started to develop it in November 2007 and I continuously update its courses and add new ones. All courses on this web site are available for free personal and academic usage.  The...
on Oct 4, 2010