Polymorphism vs Null - What's the difference?
polymorphism | null |
The ability to assume different forms or shapes.
(biology) The coexistence, in the same locality, of two or more distinct forms independent of sex, not connected by intermediate gradations, but produced from common parents.
(computer science) The feature of object-oriented programming pertaining to the dynamic treatment of data elements based on their type, allowing for an instance of a method to have several definitions. (en)
(mathematics, type theory) The property of certain typed formal systems of allowing for the use of type variables and binders/quantifiers over those type variables; likewise, the property of certain expressions (within such typed formal systems) of making use of at least one such typed variable.
(crystallography) The ability of a solid material to exist in more than one form or crystal structure; pleomorphism.
(genetics) The regular existence of two or more different genotypes within a given species or population; also, variability of amino acid sequences within a gene's protein.
* 1999 , (Matt Ridley), Genome , Harper Perennial 2004, p. 137:
* 2004 , (Richard Dawkins), The Ancestor's Tale , Phoenix 2005, p. 63:
A non-existent or empty value or set of values.
Zero]] quantity of [[expression, expressions; nothing.
Something that has no force or meaning.
(computing) the ASCII or Unicode character (), represented by a zero value, that indicates no character and is sometimes used as a string terminator.
(computing) the attribute of an entity that has no valid value.
One of the beads in nulled work.
(statistics) null hypothesis
Having no validity, "null and void"
insignificant
* 1924 , Marcel Proust, Within a Budding Grove :
absent or non-existent
(mathematics) of the null set
(mathematics) of or comprising a value of precisely zero
(genetics, of a mutation) causing a complete loss of gene function, amorphic.
As nouns the difference between polymorphism and null
is that polymorphism is the ability to assume different forms or shapes while null is zero, nil; the cardinal number before einn.polymorphism
English
(wikipedia polymorphism)Noun
- Since 1990 they have found an entirely new role: they promise understanding of how and why our genes are all so different. They hold the key to human polymorphism .
- Some polymorphisms can be quite stable – so stable that they span the change from an ancestral to a descendant species.
Derived terms
(Derived terms) * ad-hoc polymorphism * inclusion polymorphism * parametric polymorphism * subtype polymorphismSee also
* RFLP * riflip English words suffixed with -ismnull
English
Noun
(en noun)- (Francis Bacon)
- Since no date of birth was entered for the patient, his age is null .
Adjective
(en adjective)- In proportion as we descend the social scale our snobbishness fastens on to mere nothings which are perhaps no more null than the distinctions observed by the aristocracy, but, being more obscure, more peculiar to the individual, take us more by surprise.