class Hashery::Association

Association is a general binary association that allows one object to be associated with another. It has a variety of uses, such as linked-lists, simple ordered maps and mixed collections, among them.

NOTE: This class is still fairly experimental. And it is not loaded along with the other Hashery libraries when using ‘require ’hashery’‘. It must be required independently.

Associations can be used to draw simple relationships.

:Apple >> :Fruit
:Apple >> :Red

:Apple.associations #=> [ :Fruit, :Red ]

It can also be used for simple lists of ordered pairs.

c = [ :a >> 1, :b >> 2 ]
c.each { |k,v| puts "#{k} associated with #{v} }

produces

a associated with 1
b associated with 2

The method :>> is used to construct the association. It is a rarely used method so it is generally available. But you can’t use it for any of the following classes becuase they use >> for other things.

Bignum
Fixnum
Date
IPAddr
Process::Status