How to properly check for your Ruby interpreter, version and OS
I wrote a little blog post that shows the implementation of three helpful "magical" constants:
* OS: returns the current operating system
* RubyEngine: returns the current Ruby implementation
* RubyVersion: returns the current Ruby version
* OS: returns the current operating system
* RubyEngine: returns the current Ruby implementation
* RubyVersion: returns the current Ruby version

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