【Ruby on Rails】camelize
https://api.rubyonrails.org/classes/String.html#method-i-camelize
code:ruby
'active_record'.camelize # => "ActiveRecord"
'active_record'.camelize(:lower) # => "activeRecord"
'active_record/errors'.camelize # => "ActiveRecord::Errors"
'active_record/errors'.camelize(:lower) # => "activeRecord::Errors"
#rails