Maintenance Ruby 3.3 gets fixes, but no new features. Switch to Ruby 4.0 →
instance method
Kconv#issjis
Kconv.issjis(str) => true or false
ext/nkf/lib/kconv.rb
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# File tmp/rubies/ruby-3.3.0/ext/nkf/lib/kconv.rb, line 165
def issjis(str)
str.dup.force_encoding(SJIS).valid_encoding?
end
Returns whether input encoding is Shift_JIS or not.