📄 06 - defining a virtual attribute.rb
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class Arc attr_accessor :radians def degrees @radians * 180 / Math::PI end def degrees=(degrees) @radians = degrees * Math::PI / 180 endendarc = Arc.newarc.degrees = 180arc.radians # => 3.14159265358979arc.radians = Math::PI / 2arc.degrees # => 90.0#---
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