Factory & Constructor Functions

Which pattern does this code implement?

const createShape = (type, ...args) => {
  const shapes = {
    circle: (radius) => ({
      type: 'circle',
      radius,
      area: () => Math.PI * radius * radius
    }),
    rectangle: (width, height) => ({
      type: 'rectangle',
      width,
      height,
      area: () => width * height
    })
  };
  return shapes[type]?.(...args);
};

Builder Pattern
Singleton Pattern
Abstract Factory Pattern
Dynamic Factory Pattern
This code implements a Dynamic Factory Pattern where the factory method uses a map of shape creators to dynamically create different types of shapes. This approach is flexible and easily extensible - new shape types can be added by simply extending the shapes object. It also provides a consistent interface for creating different types of shapes while encapsulating the creation logic.

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