For review

revision.js

// -----------------------------------------------------------------------------------------
/**
 * object literal
 */
const circle = {
  r: 1,
  draw: () => console.log('i draw'),
};

circle.draw();

// -----------------------------------------------------------------------------------------
/**
 * factory function
 */
function createCircle(r) {
  return {
    r,
    draw: () => console.log('i draw'),
  };
}

const circle = createCircle(1);
circle.draw();

// -----------------------------------------------------------------------------------------
/**
 * constructor function
 */
function Circle(r){
  this.r = r;
  this.draw = () => console.log('i draw')
  return this;
}

const circle = new Circle(1);
// or
const circle = Circle.call({}, 1);
// or
const circle = Circle.bind({},1)();
// or
const circle = Circle.apply({},[1]);

// with inheritance
const shape = { 
  name: 'shape',
  getName: ()=> {
    return 'shape'
  }
};

const circle = Circle.call(shape, 1);

circle.draw();