I do not know of any programming language or software package that have an example or snippet of every expression or action contained , most just a brief description . The forums pretty much have examples of everyone of them in every shape and manner and a thorough search will find them , just as you found your particular expression .
C2 is still a work in progress and the allocation of time is propagated towards the engine , perhaps in the future more time can be spent on the manual and examples but for now you need to do your own research for things you do not understand and there are plenty of users here willing to help explain them.