method

camelize

v3.2.8 - Show latest stable - Class: ActiveSupport::Inflector

camelize(term, uppercase_first_letter = true)

public

By default, camelize converts strings to UpperCamelCase. If the argument to camelize is set to :lower then camelize produces lowerCamelCase.

camelize will also convert ‘/’ to ‘::’ which is useful for converting paths to namespaces.

Examples:

"active_model".camelize                # => "ActiveModel"
"active_model".camelize(:lower)        # => "activeModel"
"active_model/errors".camelize         # => "ActiveModel::Errors"
"active_model/errors".camelize(:lower) # => "activeModel::Errors"

As a rule of thumb you can think of camelize as the inverse of underscore, though there are cases where that does not hold:

"SSLError".underscore.camelize # => "SslError"

# File activesupport/lib/active_support/inflector/methods.rb, line 55
    def camelize(term, uppercase_first_letter = true)
      string = term.to_s
      if uppercase_first_letter
        string = string.sub(/^[a-z\d]*/) { inflections.acronyms[$&] || $&.capitalize }
      else
        string = string.sub(/^(?:#{inflections.acronym_regex}(?=\b|[A-Z_])|\w)/) { $&.downcase }
      end
      string.gsub(/(?:_|(\/))([a-z\d]*)/) { "#{$1}#{inflections.acronyms[$2] || $2.capitalize}" }.gsub('/', '::')
    end

1Note

Reverse version of camelize

avakhov · Jan 20, 20103 thanks

Reverse version of camelize is underscore

camelize

1Note

Reverse version of camelize

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