Created
October 23, 2019 04:28
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Decorator Pattern
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| interface Greetable{ | |
| greet(): String; | |
| } | |
| class Person implements Greetable{ | |
| constructor(public name: String) { }; | |
| greet(): String { | |
| return "Hello"; | |
| } | |
| } | |
| class PersonDecorator implements Greetable{ | |
| constructor(private person: Person) { }; | |
| greetFormally(): String{ | |
| return `${this.person.greet()}, my name is ${this.person.name}.`; | |
| } | |
| greet(): String { | |
| return this.greetFormally(); | |
| } | |
| } | |
| const person = new Person("kangfei"); | |
| const formalPerson = new PersonDecorator(person); | |
| console.log(person.greet()); | |
| console.log(formalPerson.greet()); | |
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