use proxy to add map and reduce array methods to an object in javascript

map_reduce_proxy.js

const o = {
  x: {
    v: "hello"
  },
  y: {
    v: "world"
  }
};

const handler = {
  get: (obj, prop) => {
    if (prop === "map") {
      return cb => Object.keys(obj).map((k, i) => cb(obj[k], i, obj));
    }
    if (prop === "reduce") {
      const reducer = cb => (acc, curr, idx) =>{
        return cb(acc, obj[curr], idx, obj)
      }
      return (cb, init) => Object.keys(obj).reduce(reducer(cb), init)
    }
    if (props === "length") {
      return Object.keys(obj).length;
    }
    return obj[prop];
  }
};

const x = new Proxy(o, handler)

console.log('Length', x.length)

console.log('Map', x.map(y => y.v));

const reducer = (acc, curr, idx, src) => {
  return [...acc, {idx: idx, val: curr.v}]
}
console.log('Reduce', x.reduce(reducer, []))