/**
* Prototype Pattern 原型是一种创建型设计模式， 使你能够复制对象， 甚至是复杂对象， 而又无需使代码依赖它们所属的类。
* The example class that has cloning ability. We'll see how the values of field
* with different types will be cloned.
*/
class Prototype {
public primitive: any;
public ducomponent: object;
public circularReference: ComponentWithBackReference;
public clone(): this {
const clone = Object.create(this);
clone.component = Object.create(this.ducomponent);
// Cloning an object that has a nested object with backreference
// requires special treatment. After the cloning is completed, the
// nested object should point to the cloned object, instead of the
// original object. Spread operator can be handy for this case.
clone.circularReference = {
...this.circularReference,
prototype: { ...this },
};
return clone;
}
}
/**
*
*/
class ComponentWithBackReference {
public prototype;
constructor(prototype: Prototype) {
this.prototype = prototype;
}
}
/**
* The client code.
*/
function clientCodeproto() {
const p1 = new Prototype();
p1.primitive = 245;
p1.ducomponent = new Date();
p1.circularReference = new ComponentWithBackReference(p1);
let str="";
const p2 = p1.clone();
//
if (p1.primitive == p2.primitive) {
console.log('Primitive field values have been carried over to a clone. Yay!');
str=str+"Primitive ;";
} else {
console.log('Primitive field values have not been copied. Booo!');
str=str+"not been copied;";
}
//
if (p1.ducomponent == p2.ducomponent) {
console.log('Simple component has not been cloned. Booo!');
str=str+"Simple component not been cloned;";
} else {
console.log('Simple component has been cloned. Yay!');
str=str+"Simple component;";
}
//
if (p1.circularReference == p2.circularReference) {
console.log('Component with back reference has not been cloned. Booo!');
str=str+"Component not been cloned;";
} else {
console.log('Component with back reference has been cloned. Yay!');
str=str+"Component been cloned;";
}
//
if (p1.circularReference.prototype == p2.circularReference.prototype) {
console.log('Component with back reference is linked to original object. Booo!');
str=str+"Component to original object;";
} else {
console.log('Component with back reference is linked to the clone. Yay!');
str=str+" Component to the clone;";
}
return str;
}
let strpro=clientCodeproto();
let strpro1="geovindu";
let messageprototype: string = 'Hello World,This is a typescript!,涂聚文 Geovin Du Web';
document.body.innerHTML = messageprototype+","+strpro+","+strpro1+",TypeScript 原型方法模式"
调用：
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<head><title>TypeScript:原型模式Prototype Pattern</title>
<meta name="Description" content="geovindu,涂聚文,Geovin Du"/>
<meta name="Keywords" content="geovindu,涂聚文,Geovin Du"/>
<meta name="author" content="geovindu,涂聚文,Geovin Du"/>
</head>
<body>
<script src="dist/prototypets.js"></script>
</body>
</html>
输出：
https://www.typescriptlang.org/docs/handbook/modules.html
https://www.typescriptlang.org/docs/handbook/classes.html
https://www.koderhq.com/tutorial/typescript/get-set/
https://dev.to/jmalvarez/builder-pattern-in-typescript-3on0
https://github.com/josemiguel-alvarez/design-patterns-typescript/
https://www.sourcecodeexamples.net/2020/08/typescript-prototype-pattern-example.html
https://www.tutorialspoint.com/typescript/typescript_object_prototype.htm
https://sbcode.net/typescript/prototype/
https://dev.to/takaakit/uml-diagram-for-gof-design-pattern-examples-in-typescript-46d5
https://www.dofactory.com/javascript/design-patterns/prototype