Techniques for converting Japanese to UTF-8 and half-width full angle in Ruby _ruby topics

1. Japanese Turn UTF-8
The difference between iconv.new (' cp932 ', ' utf-8 ') and iconv.new (' Shift_JIS ', ' utf-8 ')
Iconv.new (' Shift_JIS ', ' utf-8 ') does not support the following format:
Class №001-18 XXXXXXX and can only change the character of the № into No. Just do it.
But Iconv.new (' cp932 ', ' utf-8 ') supports it.
2. Half angle Full angle conversion
Look at the following code:
Require "Jcode"
$cov. Iconv (year.to_s.tr (' 0-9 ', ' 0-9 ') + ' year ' + month.to_s.tr (' 0-9 ', ' 0-9 ') + ' monthly Report ')