String

acts_like_string?

at

blank?

camelcase

camelize

classify

constantize

dasherize

deconstantize

demodulize

exclude?

first

foreign_key

from

html_safe

humanize

in_time_zone

indent
indent!

inquiry

is_utf8?

last

mb_chars

parameterize

pluralize

remove
remove!

safe_constantize

singularize

squish
squish!

strip_heredoc

tableize

titlecase

titleize

to
to_date
to_datetime
to_time

truncate
truncate_words

underscore