My solutions for the Tuenti Challenge 4 contest. Beware, not all of them are correct.
Most of them are Java sources in src/main/java, but there is one challenge solution (challenge 6) in Javascript, in src/main/js.
The sources are complemented by the diary of my participation in the contest (in spanish), with the problems and challenges I found and, mostly, the evolution of my state of mind... as such, the title is:
"Diario de un developer yonki"
http://apagayvuelveaencender.blogspot.com/2014/05/tuentichallenge4-diario-de-un-developer.html