Algo em que Nate Hopkins está trabalhando. Aqui está um snippet do documento:
Goldmine allows you to apply pivot table logic to any list for powerful data mining capabilities.
In the nomenclature of Goldmine, we call this digging for data. So we've added a dig method to Array.
More reasons to love it
* Provides ETL like functionality... but simple and elegant
* Supports method chaining for deep data mining
* Handles values that are lists themselves
* Allows you to name your pivots
* What does this all mean for you? Lets have a look.