RosettaCodeData/Task/Add-a-variable-to-a-class-instance-at-runtime/Lingo/add-a-variable-to-a-class-instance-at-runtime.lingo

obj = script("MyClass").new()

put obj.foo
-- "FOO"

-- add new property 'bar'
obj.setProp(#bar, "BAR")
put obj.bar
-- "BAR"