essentials.ts

var fullName = 'Sergio Brito';

console.log(fullName);

function setName(name: string): void {
  this.fullName = name;
}

setName('Chicharito');

console.log(fullName);

class Person {
  // Properties
  name: string;
  lastName: string;
  age: string;
  futureAge: number;
  
  // Methods
  greet() {
    console.log('Hola ', + this.name);
  }

  ageFuture() {
    console.log('')
  }

  constructor(name: string, age: number) {
    this.name;
    this.age;
  }
}

var person: Person = new Person('renaco', 36);

person.name = 'renaco';
// person.greet();

class Report {
  data: string[];
  constructor(data: string[]) {
    this.data = data;
  }
  runs(){
    this.data.forEach(function(line){
      console.log(line);
    })
  }
}

var report: Report = new Report([
  'Primera línea',
  'Segunda línea',
  'Tercer línea'
])

report.runs();

class TabbedReport extends Report{
  headers: string[];

  constructor(headers: string[], values: string[]){
    super(values)
    this.headers = headers;
  }

  run() {
    console.log(this.headers);
    super.runs();
  }
}

var headers: string[] = ['Nombre'];
var data: string[] = ['Hugo', 'Paco', 'Luis'];

var tabbedReport: TabbedReport = new TabbedReport(headers, data);

tabbedReport.run();