🦋1.2 具体原型(Concrete Prototype) 原型模式(Prototype Pattern)中的具体原型(Concrete Prototype)是指实现了抽象原型(Prototype)接口的具体类。每个具体原型类都表示一种具体的对象类型,它实现了抽象原型中定义的复制方法,用于创建该类型对象的副本。 具体原型的主要作用如下: 对象复制:具体原型类实现了复制方法,可以...
The Prototype pattern specifies the kind of objects to create using a prototypical instance. Prototypes of new products are often built prior to full production, but in this example, the prototype is passive and does not participate in copying itself. The mitotic division of a cell - resulting...
如果对象的创建成本比较大,而同一个类的不同对象之间差别不大(大部分字段都相同),在这种情况下,我们可以利用对已有对象(原型)进行复制(或者叫拷贝)的方式,来创建新对象,以达到节省创建时间的目的。这种基于原型来创建对象的方式就叫作原型设计模式,简称原型模式。 原型模式的两种实现方法 原型模式有两种实现方法,深...
The Prototype design pattern is the one in question. It allows an object to create customized objects without knowing their class or any details of how to create them. Up to this point it sounds a lot like the Factory Method pattern, the difference being the fact that for the Factory the ...
原型模式 Prototype---Design Pattern 4 原型模式 Prototype 原型模式:用原型实例指定创建对象的种类,并且通过拷贝这个原型来创建新的对象。 当我们需要多个相同的类实例时,没必要每次都使用new运算符去创建相同的类实例对象,我们可以用原型模式减少内存的消耗和达到类实例的复用。
关于prototype pattern 的详细内容可以参考《设计模式》(《Design Patterns》)它不 是本文讨论的范围。 注意,同类型与实例的关系不同的是,原型与类型的关系要求一个类型在一个时刻只能 有一个原型(而一个实例在一个时刻显然可以有多个类型)。对于JavaScript 来说,这个限制有两层含义,第一是每个具体的JavaScript 类型...
Prototype Design Pattern - Explore the Prototype Design Pattern in software development. Learn its principles, advantages, and implementation examples.
We’ve re-invented them so many times that Steve Yegge calls them“The Universal Design Pattern”. So a goblin in the game might be defined something like this: {"name":"goblin grunt","minHealth":20,"maxHealth":30,"resists":["cold","poison"],"weaknesses":["fire","light"]} ...
In the Prototype Pattern we create one standard object for each class, and clone that object to create new instances.In this example we have an abstract BookPrototype class, with two specific or concrete subclasses, PHPBookPrototype and SQLBookPrototype. To create a object using either PHPBookPr...
Prototype原型模式Intent 意图Prototypeis a creational design pattern that lets you copy existing objects...