encodings/japanese_text_parens.rb

tests/_examples/encodings/japanese_text_parens.rb in the metorex repository.

# EUC-JP spells a character in two bytes, or three for the ones that sit in
# the second plane, and `encode` carries text either way.
p("\u{3042}".encode("EUC-JP").bytes)
p("é".encode("EUC-JP").bytes)
p("\u{3042}".encode("EUC-JP").encode("UTF-8"))
p("\u{3042}".encode("EUC-JP").encoding)

# A character the answer cannot show is named by the bytes it is spelled with.
p("\u{3042}".encode("EUC-JP").inspect)
p(("a" + "\u{3042}" + "b").encode("EUC-JP").inspect)

# A character EUC-JP has no bytes for is refused.
begin
  "\u{1F600}".encode("EUC-JP")
rescue Encoding::UndefinedConversionError => trouble
  p(trouble.message)
end

# macCyrillic lays its letters out one byte to a character.
p("А".encode("macCyrillic").bytes)

# A converter carries text one call at a time, and ISO-2022-JP opens a run of
# two-byte characters with an escape and closes it when the text is done.
converter = Encoding::Converter.new("utf-8", "iso-2022-jp")
p(converter.convert("\u{9999}").bytes)
p(converter.finish.bytes)

Output:

[164, 162]
[143, 171, 177]
"あ"
#<Encoding:EUC-JP>
"\"\\x{A4A2}\""
"\"a\\x{A4A2}b\""
"U+1F600 from UTF-8 to EUC-JP"
[128]
[27, 36, 66, 57, 97]
[27, 40, 66]