From: Tab Atkins Jr. [mailto:jackalm...@gmail.com]
> Interesting idea, but I'm not sure how it's supposed to work in practice.
Doesn't answer all of your questions, and is probably half-assed in various
ways, but here is some stuff that we came up with in some live-coding during
the meeting:
```js
Map.prototype.entries = function () {
return new MapIterator({ collectAs: this.constructor[Symbol.species] });
};
class MapIterator extends Iterator {
constructor({ collectAs }) {
super();
this[Symbol.collectAs] = collectAs;
}
}
Iterator.prototype.collect = function () {
return this[Symbol.collectAs].from(...);
};
myMap.entries() // proposal: you can remove .entries()
.filter(([k, v]) => k % 2 === 0)
.map(([k, v]) => [k * 2, v])
.forEach(...);
// or .reduce(...) also forces
// or for-of
// or .collectAs(Array)
// or .collect(), which uses [Symbol.collectAs] as a default
```
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