英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：

polymorphism    音标拼音: [p,ɑlim'ɔrfɪzəm] [p,ɑlim'ɔrfɪzm]
n. 多形,同质异像,多形现象

多形,同质异像,多形现象

polymorphism
多型

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 [synonym: {polymorphism},
{pleomorphism}]
3: (biology) the existence of two or more forms of individuals
within the same animal species (independent of sex
differences)

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]

A concept first identified by
{Christopher Strachey} (1967) and developed by Hindley and
Milner, allowing {types} such as list of anything. E.g. in
{Haskell}:

length :: [a] -> Int

is a function which operates on a list of objects of any type,
a (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.

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.

See also {generic type variable}.

In {object-oriented programming}, the term is used to describe
a {variable} that may refer to objects whose {class} is not
known at {compile time} and which respond at {run time}
according to the actual class of the object to which they
refer.

(2002-08-08)


请选择你想看的字典辞典：
单词字典翻译
Polymorphism查看　Polymorphism　在百度字典中的解释百度英翻中〔查看〕
Polymorphism查看　Polymorphism　在Google字典中的解释Google英翻中〔查看〕
Polymorphism查看　Polymorphism　在Yahoo字典中的解释Yahoo英翻中〔查看〕

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Polymorphism (computer science) - Wikipedia
    [3] The most commonly recognized major forms of polymorphism are: Ad hoc polymorphism: defines a common interface for an arbitrary set of individually specified types Parametric polymorphism: does not specify concrete types and instead uses abstract symbols that can substitute for any type
  • Polymorphism in Java - GeeksforGeeks
    Polymorphism in Java is one of the core concepts in object-oriented programming (OOP) that allows objects to behave differently based on their specific class type
  • Polymorphism - C# | Microsoft Learn
    Learn about polymorphism, a key concept in object-oriented programming languages like C#, which describes the relationship between base and derived classes
  • OOP Concepts for Beginners: What Is Polymorphism - Stackify
    Polymorphism is one of the core concepts of object-oriented programming (OOP) that describes situations in which something occurs in several different forms In computer science, polymorphism describes the concept that you can access objects of different types through the same interface
  • Java Polymorphism - W3Schools
    Polymorphism means "many forms", and it occurs when we have many classes that are related to each other by inheritance Like we specified in the previous chapter; Inheritance lets us inherit attributes and methods from another class





中文字典-英文字典  2005-2009