method

constantize

v2.2.1 - Show latest stable - 0 notes - Class: ActiveSupport::Inflector

constantize(camel_cased_word) public

Tries to find a constant with the name specified in the argument string:

  "Module".constantize     # => Module
  "Test::Unit".constantize # => Test::Unit

The name is assumed to be the one of a top-level constant, no matter whether it starts with "::" or not. No lexical context is taken into account:

  C = 'outside'
  module M
    C = 'inside'
    C               # => 'inside'
    "C".constantize # => 'outside', same as ::C
  end

NameError is raised when the name is not in CamelCase or the constant is unknown.

Show source

# File activesupport/lib/active_support/inflector.rb, line 348
      def constantize(camel_cased_word)
        names = camel_cased_word.split('::')
        names.shift if names.empty? || names.first.empty?

        constant = Object
        names.each do |name|
          constant = constant.const_defined?(name) ? constant.const_get(name) : constant.const_missing(name)
        end
        constant
      end

constantize

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