Ruby Code explained

Question

Could somebody please explain this piece of Ruby code:

def add_spec_path_to(args) # :nodoc:
  args << {} unless Hash === args.last
  args.last[:spec_pa         


        

Answer 1

In a little shorter way:

def add_spec_path_to(args) # :nodoc:

...

# Append an empty hash to args UNLESS the last arg is a hash.. in which case do nothing
args << {} unless Hash === args.last # so we need a hash. If it is not there, make an empty one and put it there.

...

#if args.last[:spec_path] equals nil or false, set it to caller(0)[2]... 

#so inside that hash from the first part, if :spec_path is not there, create it by using caller(0)[2].

args.last[:spec_path] ||= caller(0)[2] 

...

end