| slovo | definícia |
polymorphism
(encz) | polymorphism,mnohotvarost n: Zdeněk Brož |
polymorphism
(encz) | polymorphism,polymorfie n: Zdeněk Brož |
polymorphism
(encz) | polymorphism,polymorfismus (biologie) [eko.] RNDr. Pavel Piskač |
polymorphism
(encz) | polymorphism,polymorfizmus n: Zdeněk Brož |
Polymorphism
(gcide) | Polymorphism \Pol`y*mor"phism\, n.
1. (Crystallog.) Same as Pleomorphism.
[1913 Webster]
2. (Biol.)
(a) The capability of assuming different forms; the
capability of widely varying in form.
(b) Existence in many forms; 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.
[1913 Webster] |
polymorphism
(wn) | polymorphism
n 1: (genetics) the genetic variation within a population that
natural selection can operate on
2: (chemistry) the existence of different kinds of crystal of
the same chemical compound [syn: polymorphism,
pleomorphism]
3: (biology) the existence of two or more forms of individuals
within the same animal species (independent of sex
differences) |
polymorphism
(foldoc) | polymorphism
polymorphic
The ability to leave parts of a type in a
typed language unspecified. The term has three distinct uses:
* Parametric polymorphism refers to the use of type variables in
a strongly typed language.
* Overloading, sometimes called ad-hoc polymorphism, means
using the same syntax for different types.
* object-oriented polymorphism allows a variable to refer
to objects whose class is not known at compile time.
(2014-01-05)
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| | podobné slovo | definícia |
Polymorphism
(gcide) | Polymorphism \Pol`y*mor"phism\, n.
1. (Crystallog.) Same as Pleomorphism.
[1913 Webster]
2. (Biol.)
(a) The capability of assuming different forms; the
capability of widely varying in form.
(b) Existence in many forms; 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.
[1913 Webster] |
single nucleotide polymorphism
(wn) | single nucleotide polymorphism
n 1: (genetics) genetic variation in a DNA sequence that occurs
when a single nucleotide in a genome is altered; SNPs are
usually considered to be point mutations that have been
evolutionarily successful enough to recur in a significant
proportion of the population of a species [syn: {single
nucleotide polymorphism}, SNP] |
ad-hoc polymorphism
(foldoc) | overloading
ad-hoc polymorphism
operator overloading
(Or "Operator overloading"). Use of a single
symbol to represent operators with different argument types,
e.g. "-", used either, as a monadic operator to negate an
expression, or as a dyadic operator to return the difference
between two expressions. Another example is "+" used to add
either integers or floating-point numbers. Overloading is
also known as ad-hoc polymorphism.
User-defined operator overloading is provided by several
modern programming languages, e.g. C++'s class system and
the functional programming language Haskell's {type
class}es.
Ad-hoc polymorphism (better described as overloading) is the
ability to use the same syntax for objects of different types,
e.g. "+" for addition of reals and integers or "-" for unary
negation or diadic subtraction. Parametric polymorphism
allows the same object code for a function to handle arguments
of many types but overloading only reuses syntax and requires
different code to handle different types.
(2014-01-05)
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object-oriented polymorphism
(foldoc) | object-oriented polymorphism
The kind of polymorphism found in {object-oriented
programming} languages where a variable can refer to an object
whose class is not known exactly until run time. A method
can use a variable of a given class - call other methods on it,
pass it as an argument, etc. - without needing to know to which
subclass it refers, as long as its actual class is compatible with
those uses.
(2014-01-05)
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parametric polymorphism
(foldoc) | parametric polymorphism
Polymorphism was first identified by Christopher Strachey in
1967 and developed by Hindley and Milner.
For example we could specify that the argument of the "head"
function was a list without specifying a type for the elements
of the list. In Haskell we would write:
head :: [a] -> a
meaning head has type function from "list of a" to "a" where "a"
is a type variable). This is known as parametric polymorphism.
Polymorphic typing allows strong type checking as well as generic
functions. ML in 1976 was the first language with polymorphic
typing.
See also generic type variable.
(2014-01-05)
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