US-ASCII e$B$Je(B script e$BCf$Ge(B “\u3042”.encoding e$B$,e(B
ASCII-8BIT e$B$K$Je(B
e$B$j$^$9!#e(B
% ./ruby -ve '# -- coding:us-ascii --
s = “\u3042”
p s
p s.encoding
’
ruby 1.9.0 (2008-01-26 revision 15237) [i686-linux]
“\xE3\x81\x82”
#Encoding:ASCII-8BIT