attr_set_once

This gem adds a attr_set_once to the Class class. Use attr_set_once like attr_accessor.

class MyClass
    attr_set_once :hsa
end

The attribute can be set as usual:

myob = MyClass.new
myob.hsa = 'x'
myob.hsa #=> x

However, once the attribute has been set, it cannot be set again.

myob.hsa = 'y' # raises 'set-once-instance-variable-already-set: hsa'

Install

gem install setonce

Author

Mike O'Sullivan mike@idocs.com

History

version	date	notes
1.0	Mar 2, 2020	Initial upload.