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Ruby 4.0 update brings ZJIT, isolation features, and more

The Ruby programming language continues its tradition of delivering major updates on Christmas Day, announcing the release of ...
Ars Technica

Ruby: Determining whether a variable is a number or not?

Ruby Beginner question:<BR><BR>Is there anyway I can determine whether a variable is a number or not? I understand in Ruby that you can convert variables to Integers by using the ".to_i" method. But ...