What is the difference between the map method and a regular object in JavaScript?

// The map() method for arrays creates a new array
// by applying a transformation function to each element of the original array.
const array = [1, 2, 3];
const newArray = array.map(item => item * 2);
// newArray will be [2, 4, 6]

A regular JavaScript object:

// Is an unordered set of key-value pairs.
// Keys are either strings or Symbols.
const object = {
  a: 1,
  b: 2,
  c: 3
};
// The order of properties is not guaranteed.

Differences:

Characteristic	Array.prototype.map()	Regular object
Purpose	Transforming array elements and creating a new array.	Storing an unordered set of data by keys.
Type	Array method.	Data structure.
Iterability	Creates a new iterable array.	Not iterable by default in insertion order.
Keys	Works with array elements by index.	Works with keys that are strings or Symbols.
Order	Preserves the order of elements from the original array.	Property order is not guaranteed before ES2015, but guaranteed for non-numeric keys after.
Performance	Optimized for array iteration and transformation.	Depends on the JS engine implementation and the number of properties.