encoding_transcoding

🔤 On-the-Fly Encoding Conversion

When reading or writing files in different encodings, use File.open with :external_encoding and :internal_encoding to transcode automatically. This avoids manual String#encode calls and error handling.

# Read UTF-16LE, write UTF-8
File.open('source.txt', 'r:utf-16le:utf-8') do |src|
  File.open('dest.txt', 'w:utf-8') do |dst|
    IO.copy_stream(src, dst)
  end
end

You can also specify :invalid => :replace or :undef => :replace to handle malformed data seamlessly.