How to use a method provided by active_support outside of rails

Question

How can I use a method that is defined in ActiveSupport module?

For example I wanted to use camelize method.

I tried this code, but it didn't work with undefined method error.

require 'active_support'
"foo_bar".camelize

Answer 1

You can require just the part that supplies camelize, rather than all of Active Support:

require 'active_support/core_ext/string'
"camel_this".camelize => "CamelThis"

Answer 2

You'll need to do require 'active_support/all'

This explains it...

http://guides.rubyonrails.org/active_support_core_extensions.html