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To add another example to the list, Ruby lets you list which attributes can be read/written and which ones can only be read on top. Something like. class Car
by muchabi 12y ago
To add another example to the list, Ruby lets you list which attributes can be read/written and which ones can only be read on top. Something like.
class Car
attr_reader :model, :company # only read
attr_accessor :color # read and write
end
- dopamean 12y agoIt's worth noting that in Ruby the difference between attr_reader and attr_writer is not the same as read only and write only. You can write to something set with attr_reader. All attr_writer does is allow complete reassignment of that particular instance variable. This is pretty trivial so bear with me... If you have something that looks like this... class Person attr_reader :children def initialize @children = [] end end You can then do this... x = Person.new x << "Bobby" You will have then altered the value of @children without completely reassigning it.