| http://www.w3.org/ns/prov#value | - No matter what object I am working with, I can find its length with the .length property if such property is meaningfull. len() on the other hand, only works for certain types of objects. (I do not do Python, but I know my type theory) What exactly do you think a type is in a language like Ruby or Python?A duck type for an object is the type defined by the methods (and their signatures) it respo
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