"ts abstract class" Code Answer's
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ts abstract class
abstract class Person {
name: string;
constructor(name: string) {
this.name = name;
}
display(): void{
console.log(this.name);
}
abstract find(string): Person;
}
class Employee extends Person {
empCode: number;
constructor(name: string, code: number) {
super(name); // must call super()
this.empCode = code;
}
find(name:string): Person {
// execute AJAX request to find an employee from a db
return new Employee(name, 1);
}
}
let emp: Person = new Employee("James", 100);
emp.display(); //James
let emp2: Person = emp.find('Steve');
Source: www.tutorialsteacher.com
abstract classes in typescript
abstract class Department {
constructor(public name: string) {}
printName(): void {
console.log("Department name: " + this.name);
}
abstract printMeeting(): void; // must be implemented in derived classes
}
class AccountingDepartment extends Department {
constructor() {
super("Accounting and Auditing"); // constructors in derived classes must call super()
}
printMeeting(): void {
console.log("The Accounting Department meets each Monday at 10am.");
}
generateReports(): void {
console.log("Generating accounting reports...");
}
}
let department: Department; // ok to create a reference to an abstract type
department = new Department(); // error: cannot create an instance of an abstract class
Cannot create an instance of an abstract class.2511Cannot create an instance of an abstract class.department = new AccountingDepartment(); // ok to create and assign a non-abstract subclass
department.printName();
department.printMeeting();
department.generateReports();
Property 'generateReports' does not exist on type 'Department'.2339Property 'generateReports' does not exist on type 'Department'.Try
Source: www.typescriptlang.org
classes in typescript
class Info {
private name: string ;
constructor(n:string){
this.name = n ;
};
describe(){
console.log(`Your name is ${this.name}`);
}
}
const a = new Info('joyous');
a.describe();
abstract classes in typescript
abstract class Animal {
abstract makeSound(): void;
move(): void {
console.log("roaming the earth...");
}
}Try
Source: www.typescriptlang.org
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