BernardK
Programming Ruby 3.2 (5th Edition): B4.0 page 525, HAL
page 525, last example :
… and "IBM".tr("B-Z", "A-Y") => "HAL"
… for those who have seen the film 2001: A Space Odyssey 
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noelrappin
Author of Modern Front-End Development for Rails
Are you saying you want me to add the example here?
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