agile mysql postgresql rails ruby ruby on rails computing cross-platform software oracle database apache http server lighttpd activerecord (rails) the pragmatic programmer openlink rails odbc adapter pragmatic xml scripting languages ruby (programming language) ruby programming language c# extreme programming junit software engineering software testing test test driven testing computer programmers software development unit testing andy hunt (author) dave thomas (programmer) java nunit cvs computer programming concurrent versions system javascript web 2.0 web application frameworks javascript programming language tigermouse test-driven development software architecture web application web development ajax (programming) curly bracket programming languages variable (programming) this (computer science) smalltalk web application framework