Author
Niranjan Sarade
About the utility - HashKeyAsAttribute
In ruby, we have OpenStruct which allows the creation of data objects with arbitrary attributes. With ruby’s metaprogramming capability, we can also allow hash values to be set and retrieved as if they were its attributes. So setting and getting the value for the key would be treated as if they were method calls on the hash object. If the key does not correspond to any hash entry, it should return “The key does not correspond to any hash entry” message. The hook that has been used is Kernel’s method_missing.
Example
require ‘hash_key_as_attribute’
h = {} h.one = 1 puts h.one #=> 1
h.two= [1,2,3,4] puts h.two.inspect #=> [1,2,3,4]
puts h.three #=> “The key does not correspond to any hash entry”
puts h.inspect #=> :two=>[1, 2, 3, 4]
h2 = {} h2.four = 4
h.three = h2
puts h.three.inspect #=> :four=>4
puts h.three.four #=> 4
Install
gem install hash_key_as_attribute
(It has been pushed to gemcutter.org)
OR
Download the gem file from github.com/NiranjanSarade/hash_key_as_attribute.git/ gem install hash_key_as_attribute-0.0.1.gem
Uninstall
gem uninstall hash_key_as_attribute