April 2018
Beginner
536 pages
13h 21m
English
All our classes should adhere to the single responsibility principle (SRP). The Person class declared during the very first example in this chapter represents a person, including all of their characteristics (attributes) and behaviors (methods). We are going to modify the preceding class by adding an email as validation logic:
class Person { public name: string; public surname: string; public email: string; public constructor( name: string, surname: string, email: string ) { this.surname = surname; this.name = name; if (this.validateEmail(email)) { this.email = email; } else { throw new Error("Invalid email!"); } } public validateEmail(email: string) { const re = /S+@S+.S+/; return re.test(email); ...