irb
irb(main):001:0> “郭爽”.length
=> 6
irb(main):002:0> $KCODE=’utf8′
=> “utf8″
irb(main):003:0> require “jcode”
=> true
irb(main):004:0> “郭爽”.jlength
=> 2
irb
irb(main):001:0> “郭爽”.length
=> 6
irb(main):002:0> $KCODE=’utf8′
=> “utf8″
irb(main):003:0> require “jcode”
=> true
irb(main):004:0> “郭爽”.jlength
=> 2