version: ruby 1.9.3p0
SJISからUTF-16LEへの変換パス
SJIStoUTF-16LE.rb
p Encoding::Converter.new("SJIS", "UTF-16LE").convpath
#=> [[#<Encoding:Windows-31J>, #<Encoding:UTF-8>], [#<Encoding:UTF-8>, #<Encoding:UTF-16LE>]]
Shift_JISからUTF-16LEへの変換パス
Shift_JIStoUTF-16LE.rb
p Encoding::Converter.new("Shift_JIS", "UTF-16LE").convpath
#=> [[#<Encoding:Shift_JIS>, #<Encoding:UTF-8>], [#<Encoding:UTF-8>, #<Encoding:UTF-16LE>]]