What is to_js and to_json?

rubyonrails-talk
1

http://www.noobkit.com/show/ruby/ruby/standard-library/json.html

May give an accurate enough overview. I find it very helpful for converting an array of values in Ruby to an array of values in Javascript.

2

This is a nicely laid out description of the JavaScript Object Notation (JSON) serialization format: http://www.json.org/

Sorry, I'm unfamiliar with to_js method. Where is that one defined? I didn't see it anywhere in the Rails documentation.

3

Both are used for the same purpose?