lab42_ihash

A Hash with Business Logic ( call it intelligent ).

Actually it is a view layer over a Hash like object, which needs to obey the simple protocol

Hash#fetch.

The services IHash provides are of the number of four:

• Default values per key.
• Validation via Constraints.
• Business Logic or Lookup Logic.
• Caching of Computed Values.

    gem install lab42_ihash --pre

    require 'lab42/ihash'

    IHash = Lab42::IHash

Or to do the same in one line of code

    require 'lab42/ihash/auto_import'

Details are explained in the QED demos here