JSON, Again
JSON stands for Javascript Object Notation. It is a string version of a Javascript Object. Hashes in Ruby can easily be converted to JSON. In turn, this JSON can be used by an AJAX call on the client (Javascript) side.
JSON Example
{
"sleep": "haz sleep last night yay",
"awake": true,
"times": "can be had in jamaica",
"ice_cream": "dreamsicle",
"people": "this class"
}