class ActiveSupport::Inflector::Inflections

# File activesupport/lib/active_support/inflector/inflections.rb, line 134
def acronym(word)
  @acronyms[word.downcase] = word
  define_acronym_regex_patterns
end

Specifies a new acronym. An acronym must be specified as it will appear in a camelized string. An underscore string that contains the acronym will retain the acronym when passed to camelize, humanize, or titleize. A camelized string that contains the acronym will maintain the acronym when titleized or humanized, and will convert the acronym into a non-delimited single lowercase word when passed to underscore.

acronym 'HTML'
titleize 'html'     # => 'HTML'
camelize 'html'     # => 'HTML'
underscore 'MyHTML' # => 'my_html'

The acronym, however, must occur as a delimited unit and not be part of another word for conversions to recognize it:

acronym 'HTTP'
camelize 'my_http_delimited' # => 'MyHTTPDelimited'
camelize 'https'             # => 'Https', not 'HTTPs'
underscore 'HTTPS'           # => 'http_s', not 'https'

acronym 'HTTPS'
camelize 'https'   # => 'HTTPS'
underscore 'HTTPS' # => 'https'

Note: Acronyms that are passed to pluralize will no longer be recognized, since the acronym will not occur as a delimited unit in the pluralized result. To work around this, you must specify the pluralized form as an acronym as well:

acronym 'API'
camelize(pluralize('api')) # => 'Apis'

acronym 'APIs'
camelize(pluralize('api')) # => 'APIs'

acronym may be used to specify any word that contains an acronym or otherwise needs to maintain a non-standard capitalization. The only restriction is that the word must begin with a capital letter.

acronym 'RESTful'
underscore 'RESTful'           # => 'restful'
underscore 'RESTfulController' # => 'restful_controller'
titleize 'RESTfulController'   # => 'RESTful Controller'
camelize 'restful'             # => 'RESTful'
camelize 'restful_controller'  # => 'RESTfulController'

acronym 'McDonald'
underscore 'McDonald' # => 'mcdonald'
camelize 'mcdonald'   # => 'McDonald'

# File activesupport/lib/active_support/inflector/inflections.rb, line 223
def clear(scope = :all)
  case scope
  when :all
    @plurals, @singulars, @uncountables, @humans = [], [], Uncountables.new, []
  else
    instance_variable_set "@#{scope}", []
  end
end

Clears the loaded inflections within a given scope (default is :all). Give the scope as a symbol of the inflection type, the options are: :plurals, :singulars, :uncountables, :humans.

clear :all
clear :plurals

# File activesupport/lib/active_support/inflector/inflections.rb, line 212
def human(rule, replacement)
  @humans.prepend([rule, replacement])
end

Specifies a humanized form of a string by a regular expression rule or by a string mapping. When using a regular expression based replacement, the normal humanize formatting is called after the replacement. When a string is used, the human form should be specified as desired (example: 'The name', not 'the_name').

human /_cnt$/i, '\1_count'
human 'legacy_col_person_name', 'Name'

# File activesupport/lib/active_support/inflector/inflections.rb, line 166
def irregular(singular, plural)
  @uncountables.delete(singular)
  @uncountables.delete(plural)

  s0 = singular[0]
  srest = singular[1..-1]

  p0 = plural[0]
  prest = plural[1..-1]

  if s0.upcase == p0.upcase
    plural(/(#{s0})#{srest}$/i, '\1' + prest)
    plural(/(#{p0})#{prest}$/i, '\1' + prest)

    singular(/(#{s0})#{srest}$/i, '\1' + srest)
    singular(/(#{p0})#{prest}$/i, '\1' + srest)
  else
    plural(/#{s0.upcase}(?i)#{srest}$/,   p0.upcase   + prest)
    plural(/#{s0.downcase}(?i)#{srest}$/, p0.downcase + prest)
    plural(/#{p0.upcase}(?i)#{prest}$/,   p0.upcase   + prest)
    plural(/#{p0.downcase}(?i)#{prest}$/, p0.downcase + prest)

    singular(/#{s0.upcase}(?i)#{srest}$/,   s0.upcase   + srest)
    singular(/#{s0.downcase}(?i)#{srest}$/, s0.downcase + srest)
    singular(/#{p0.upcase}(?i)#{prest}$/,   s0.upcase   + srest)
    singular(/#{p0.downcase}(?i)#{prest}$/, s0.downcase + srest)
  end
end

Specifies a new irregular that applies to both pluralization and singularization at the same time. This can only be used for strings, not regular expressions. You simply pass the irregular in singular and plural form.

irregular 'octopus', 'octopi'
irregular 'person', 'people'

# File activesupport/lib/active_support/inflector/inflections.rb, line 143
def plural(rule, replacement)
  @uncountables.delete(rule) if rule.is_a?(String)
  @uncountables.delete(replacement)
  @plurals.prepend([rule, replacement])
end

Specifies a new pluralization rule and its replacement. The rule can either be a string or a regular expression. The replacement should always be a string that may include references to the matched data from the rule.

# File activesupport/lib/active_support/inflector/inflections.rb, line 153
def singular(rule, replacement)
  @uncountables.delete(rule) if rule.is_a?(String)
  @uncountables.delete(replacement)
  @singulars.prepend([rule, replacement])
end

Specifies a new singularization rule and its replacement. The rule can either be a string or a regular expression. The replacement should always be a string that may include references to the matched data from the rule.

# File activesupport/lib/active_support/inflector/inflections.rb, line 200
def uncountable(*words)
  @uncountables.add(words)
end

Specifies words that are uncountable and should not be inflected.

uncountable 'money'
uncountable 'money', 'information'
uncountable %w( money information rice )