コマンドプロンプト上であえてutf-8した
[1] pry(main)> #encoding: utf-8
[2] pry(main)>
[3] pry(main)> str = "こんにちわ"
=> "x82xB1x82xF1x82xC9x82xBFx82xED"
[4] pry(main)> str.size
=> 10
[5] pry(main)> p str.encoding
#
=> #
[6] pry(main)> p str
"x82xB1x82xF1x82xC9x82xBFx82xED"
=> "x82xB1x82xF1x82xC9x82xBFx82xED"
こんどはShift_JISする
[1] pry(main)> # encoding: Shift_JIS
[2] pry(main)>
[3] pry(main)> str = "こんにちわ"
=> "x82xB1x82xF1x82xC9x82xBFx82xED"
[4] pry(main)> p str.encoding
#
=> #
[5] pry(main)> p str.size
10
=> 10
2.0のせいなのか書いたとおりに書いて同じ結果にならない「」この部分。
次。
[7] pry(main)> p "Hello".encoding
#
=> #
[8] pry(main)> p Encoding.list
[#, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #, #]
何か配列ですげーかえってきた。なんでーアスキーなのかなー。pryのせいかなー。
NKFの章はダメポ。何かだめなのだろうな。
[1] pry(main)> require 'nkf'
=> true
[2] pry(main)> p NKF.nkf("-s -m0", "x82xB1x82xF1x82xC9x82xBFx82xED")
"x{82B1}x{82F1}x{82C9}x{82BF}x{82ED}"
=> "x{82B1}x{82F1}x{82C9}x{82BF}x{82ED}"
[3] pry(main)> p NKF.nkf("-w -m0", "x82xB1x82xF1x82xC9x82xBFx82xED")
"u3053u3093u306Bu3061u308F"
=> "u3053u3093u306Bu3061u308F"
[4] pry(main)> p NKF.nkf("-W -m0", "x82xB1x82xF1x82xC9x82xBFx82xED")
ArgumentError: no output encoding given
from (pry):4:in `nkf'
[5] pry(main)> p NKF.nkf("-s -m0", "こんにちわ")
"x{82B1}x{82F1}x{82C9}x{82BF}x{82ED}"
=> "x{82B1}x{82F1}x{82C9}x{82BF}x{82ED}"
[6] pry(main)> p NKF.nkf("-w -m0", "こんにちわ")
"u3053u3093u306Bu3061u308F"
=> "u3053u3093u306Bu3061u308F"
[7] pry(main)> p NKF.nkf("-e -m0", "こんにちわ")
"x{A4B3}x{A4F3}x{A4CB}x{A4C1}x{A4EF}"
=> "x{A4B3}x{A4F3}x{A4CB}x{A4C1}x{A4EF}"
[8] pry(main)> exit