Indexed Object Array

indexed-object-array.js

class IndexedObjectArray extends Array {
  #map;

  constructor(length) {
    super(length);
  }
  
  toMap() {
    return this.#map;
  }

  indexBy(key) {
    this.#map = new Map();
    for (let obj of this) {
    	this.#map.set(obj[key], obj);
    }
    return this;
  }

  get(index) {
    return this.#map.get(index);
  }
}