Farrel Lifson ha scritto:
> I've made the initial release of Precedence which is a small API to
> construct and analyse precedence networks, which are used quite a bit
> in project management and other areas. Here's the README file:
> 
> = Precedence
> 
> Precedence is a library that allows for the creation, manipulation and analysis
> of precedence networks.

wow, this seem cool, thanks for releasing it.
Anyway, I wonder why you designed the api this way (I'm dumb that's not 
your fault):
  why add_activity does not allow pre and post conditions to be set ?
Also, IMHO an alias #<< for #add_activity would be nice