Web Reference: AM Coder - Ruby OOP - attr_reader, attr_writer, and attr_accessor Code, Data and Tech with Alex Merced 5.18K subscribers Subscribe What is attr_accessor, attr_reader & attr_writer used for in Ruby? How do you use attribute accessors & why do we use them? Find out the answers in this Ruby tutorial! In ruby, like in some other OO languages, every variable is a pointer to an instance. So if you have an attribute to an Hash, for example, and you set it to be "read only" you always could change its content, but not the content of pointer.
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