Ruby StringScanner.getch用法及代码示例

扫描一个字符并返回它。此方法对多字节字符敏感。

s = StringScanner.new("ab")
s.getch           # => "a"
s.getch           # => "b"
s.getch           # => nil

s = StringScanner.new("\244\242".force_encoding("euc-jp"))
s.getch           # => "\x{A4A2}"   # Japanese hira-kana "A" in EUC-JP
s.getch           # => nil