📄 00 - introduction
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people = Hash.newpeople[:nickname] = 'Matz'people[:language] = 'Japanese'people['last name'.intern] = 'Matsumoto'people[:nickname] # => "Matz"people['nickname'.intern] # => "Matz"#---'name'.object_id # => -605973716'name'.object_id # => -605976356'name'.object_id # => -605978996#---:name.object_id # => 878862:name.object_id # => 878862'name'.intern.object_id # => 878862'name'.intern.object_id # => 878862#---
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