module ActiveSupport
module ActiveSupport::Autoload
module ActiveSupport::Benchmarkable
module ActiveSupport::Cache
module ActiveSupport::Cache::MemCacheStore::LocalCacheWithRaw
module ActiveSupport::Cache::Strategy
module ActiveSupport::Cache::Strategy::LocalCache
module ActiveSupport::Callbacks
module ActiveSupport::Callbacks::ClassMethods
module ActiveSupport::Callbacks::Conditionals
module ActiveSupport::Callbacks::Filters
module ActiveSupport::Concern
module ActiveSupport::Concurrency
module ActiveSupport::Configurable
module ActiveSupport::Configurable::ClassMethods
module ActiveSupport::Dependencies
module ActiveSupport::Dependencies::Blamable
module ActiveSupport::Dependencies::Loadable
module ActiveSupport::Dependencies::ModuleConstMissing
module ActiveSupport::Deprecation::Behavior
module ActiveSupport::Deprecation::InstanceDelegator
module ActiveSupport::Deprecation::InstanceDelegator::ClassMethods
module ActiveSupport::Deprecation::MethodWrapper
module ActiveSupport::Deprecation::Reporting
module ActiveSupport::DescendantsTracker
module ActiveSupport::Gzip
module ActiveSupport::Inflector
module ActiveSupport::JSON
module ActiveSupport::JSON::Encoding
module ActiveSupport::LogSubscriber::TestHelper
module ActiveSupport::MessageEncryptor::NullSerializer
module ActiveSupport::Multibyte
module ActiveSupport::Multibyte::Unicode
module ActiveSupport::Notifications
module ActiveSupport::Notifications::Fanout::Subscribers
module ActiveSupport::NumberHelper
module ActiveSupport::PerThreadRegistry
module ActiveSupport::Rescuable
module ActiveSupport::Rescuable::ClassMethods
module ActiveSupport::SecurityUtils
module ActiveSupport::TaggedLogging
module ActiveSupport::TaggedLogging::Formatter
module ActiveSupport::Testing
module ActiveSupport::Testing::Assertions
module ActiveSupport::Testing::ConstantLookup
module ActiveSupport::Testing::ConstantLookup::ClassMethods
module ActiveSupport::Testing::Declarative
module ActiveSupport::Testing::Deprecation
module ActiveSupport::Testing::Isolation
module ActiveSupport::Testing::Isolation::Forking
module ActiveSupport::Testing::Isolation::Subprocess
module ActiveSupport::Testing::SetupAndTeardown
module ActiveSupport::Testing::SetupAndTeardown::ClassMethods
module ActiveSupport::Testing::TaggedLogging
module ActiveSupport::Testing::TimeHelpers
module ActiveSupport::VERSION
module ActiveSupport::XmlMini
module ActiveSupport::XmlMini::FileLike
module ActiveSupport::XmlMini_JDOM
module ActiveSupport::XmlMini_LibXML
module ActiveSupport::XmlMini_LibXMLSAX
module ActiveSupport::XmlMini_Nokogiri
module ActiveSupport::XmlMini_Nokogiri::Conversions
module ActiveSupport::XmlMini_Nokogiri::Conversions::Document
module ActiveSupport::XmlMini_Nokogiri::Conversions::Node
module ActiveSupport::XmlMini_NokogiriSAX
module ActiveSupport::XmlMini_REXML
module DateAndTime
module DateAndTime::Calculations
module DateAndTime::Zones
module Digest
module Digest::UUID
module ERB::Util
module Enumerable
module I18n
module Kernel
module LibXML
module LibXML::Conversions
module LibXML::Conversions::Document
module LibXML::Conversions::Node
module LoggerSilence
module Marshal
module Module::Concerning
module QualifiedConstUtils
module URI
class ActiveSupport::BacktraceCleaner
class ActiveSupport::Cache::Entry
class ActiveSupport::Cache::FileStore
class ActiveSupport::Cache::MemCacheStore
class ActiveSupport::Cache::MemoryStore
class ActiveSupport::Cache::NullStore
class ActiveSupport::Cache::Store
class ActiveSupport::Cache::Strategy::LocalCache::LocalCacheRegistry
class ActiveSupport::Cache::Strategy::LocalCache::LocalStore
class ActiveSupport::Cache::Strategy::LocalCache::Middleware
class ActiveSupport::CachingKeyGenerator
class ActiveSupport::Callbacks::Callback
class ActiveSupport::Callbacks::CallbackChain
class ActiveSupport::Callbacks::CallbackSequence
class ActiveSupport::Callbacks::Conditionals::Value
class ActiveSupport::Callbacks::Filters::After
class ActiveSupport::Callbacks::Filters::Around
class ActiveSupport::Callbacks::Filters::Before
class ActiveSupport::Callbacks::Filters::End
class ActiveSupport::Concern::MultipleIncludedBlocks
class ActiveSupport::Concurrency::Latch
class ActiveSupport::Configurable::Configuration
class ActiveSupport::Dependencies::ClassCache
class ActiveSupport::Dependencies::WatchStack
class ActiveSupport::Deprecation
class ActiveSupport::Deprecation::DeprecatedConstantProxy
class ActiveSupport::Deprecation::DeprecatedInstanceVariableProxy
class ActiveSupport::Deprecation::DeprecatedObjectProxy
class ActiveSupport::Deprecation::DeprecationProxy
class ActiveSupport::DeprecationException
class ActiveSupport::Duration
class ActiveSupport::FileUpdateChecker
class ActiveSupport::Gzip::Stream
class ActiveSupport::HashWithIndifferentAccess
class ActiveSupport::Inflector::Inflections
class ActiveSupport::InheritableOptions
class ActiveSupport::JSON::Encoding::JSONGemEncoder
class ActiveSupport::JSON::Encoding::JSONGemEncoder::EscapedString
class ActiveSupport::KeyGenerator
class ActiveSupport::LegacyKeyGenerator
class ActiveSupport::LogSubscriber
class ActiveSupport::LogSubscriber::TestHelper::MockLogger
class ActiveSupport::Logger
class ActiveSupport::Logger::SimpleFormatter
class ActiveSupport::MessageEncryptor
class ActiveSupport::MessageEncryptor::InvalidMessage
class ActiveSupport::MessageVerifier
class ActiveSupport::MessageVerifier::InvalidSignature
class ActiveSupport::Multibyte::Chars
class ActiveSupport::Multibyte::Unicode::Codepoint
class ActiveSupport::Multibyte::Unicode::UnicodeDatabase
class ActiveSupport::Notifications::Event
class ActiveSupport::Notifications::Fanout
class ActiveSupport::Notifications::Fanout::Subscribers::AllMessages
class ActiveSupport::Notifications::Fanout::Subscribers::Evented
class ActiveSupport::Notifications::Fanout::Subscribers::Timed
class ActiveSupport::Notifications::InstrumentationRegistry
class ActiveSupport::Notifications::Instrumenter
class ActiveSupport::NumberHelper::NumberConverter
class ActiveSupport::NumberHelper::NumberToCurrencyConverter
class ActiveSupport::NumberHelper::NumberToDelimitedConverter
class ActiveSupport::NumberHelper::NumberToHumanConverter
class ActiveSupport::NumberHelper::NumberToHumanSizeConverter
class ActiveSupport::NumberHelper::NumberToPercentageConverter
class ActiveSupport::NumberHelper::NumberToPhoneConverter
class ActiveSupport::NumberHelper::NumberToRoundedConverter
class ActiveSupport::OptionMerger
class ActiveSupport::OrderedHash
class ActiveSupport::OrderedOptions
class ActiveSupport::ProxyObject
class ActiveSupport::Railtie
class ActiveSupport::SafeBuffer
class ActiveSupport::SafeBuffer::SafeConcatError
class ActiveSupport::StringInquirer
class ActiveSupport::Subscriber
class ActiveSupport::SubscriberQueueRegistry
class ActiveSupport::TestCase
class ActiveSupport::Testing::SimpleStubs
class ActiveSupport::TimeWithZone
class ActiveSupport::TimeZone
class ActiveSupport::XMLConverter
class ActiveSupport::XMLConverter::DisallowedType
class ActiveSupport::XmlMini_LibXMLSAX::HashBuilder
class ActiveSupport::XmlMini_NokogiriSAX::HashBuilder
class Array
class BigDecimal
class Class
class Date
class DateTime
class ERB
class FalseClass
class File
class Float
class Hash
class I18n::Railtie
class Integer
class LoadError
class Method
class Module
class Module::DelegationError
class NameError
class NilClass
class Numeric
class Object
class Process::Status
class Range
class Regexp
class String
class Struct
class Symbol
class Thread
class Time
class TrueClass
activesupport
4.2.5.2
# downcase
def downcase(string) apply_mapping string, :lowercase_mapping end