Ruby singleton classes explained
I’ve become used to JavaScript (gasp! cringe!) in writing Cartagen and sometimes find myself wanting to assign arbitrary attributes to objects I just made up. Unfortunately this JavaScript code:
var new_object = { we: 'can', make: 'up', any: 'thing' }
doesn’t work in Ruby:
new_object = {}
new_object.latitude = 'lalalala'
It yields:
undefined local variable or method `latitude' for []:Array
But you can create what are called ‘singleton objects’, as described on contextualdevelopment.com:
foobar = Array.new def foobar.size "Hello World!" end foobar.size # => "Hello World!" foobar.class # => Array
Hooray!
