Method: String#is_utf8?

Defined in:
lib/active_support/core_ext/string/multibyte.rb

#is_utf8? ⇒ Boolean

Returns true if string has utf_8 encoding.

utf_8_str = "some string".encode "UTF-8"
iso_str = "some string".encode "ISO-8859-1"

utf_8_str.is_utf8? # => true
iso_str.is_utf8?   # => false



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# File 'lib/active_support/core_ext/string/multibyte.rb', line 57

def is_utf8?
  case encoding
  when Encoding::UTF_8, Encoding::US_ASCII
    valid_encoding?
  when Encoding::ASCII_8BIT
    dup.force_encoding(Encoding::UTF_8).valid_encoding?
  else
    false
  end
end