Creation Date of 'me' ABRecord

#!/usr/bin/macruby

# Need the AddressBook framework
framework 'AddressBook'

# Singleton
ab = ABAddressBook.sharedAddressBook

# me is the ABRecord of the current logged in user
# valueForProperty() is the KVO method to get the constant
# note the uppercase K. In Obj-C, the property is kABCreationDateProperty
creation_date = ab.me.valueForProperty(KABCreationDateProperty) # => NSDate object

# NSDate objects are not converted to Ruby Date objects
# Obj-C uses formatters to create strings from dates
date_formatter = NSDateFormatter.alloc.init

# Another constant
date_formatter.setDateStyle(NSDateFormatterMediumStyle)

# Here's our string
creation_date_string = date_formatter.stringFromDate(creation_date) 

puts creation_date_string # => 'Jun 11, 2010'