conditional_methods.js

function Person() {
  this.name = 'Rafael';
  this.age = 36;

  return {
    getName: () => {
      return this.name;
    },
    getAge: () => {
      return this.age;
    },
  }
}

const person = new Person;

console.log(person[false ? 'getName' : 'getAge']());