Converting string from snake_case to CamelCase in Ruby Converting string from snake_case to CamelCase in Ruby ruby ruby

Converting string from snake_case to CamelCase in Ruby


If you're using Rails, String#camelize is what you're looking for.

  "active_record".camelize                # => "ActiveRecord"  "active_record".camelize(:lower)        # => "activeRecord"

If you want to get an actual class, you should use String#constantize on top of that.

"app_user".camelize.constantize


How about this one?

"hello_world".split('_').collect(&:capitalize).join #=> "HelloWorld"

Found in the comments here: Classify a Ruby string

See comment by Wayne Conrad


If you use Rails, Use classify. It handles edge cases well.

"app_user".classify # => AppUser"user_links".classify   # => UserLink

Note:

This answer is specific to the description given in the question(it is not specific to the question title). If one is trying to convert a string to camel-case they should use Sergio's answer. The questioner states that he wants to convert app_user to AppUser (not App_user), hence this answer..