Has it been discussed yet to add an .update() method to Map and Set, a
la Python, which take an iterable (yielding [key, value] for Map, and
just value for Set) and add the iterable's entries to the Map/Set?

It desugars easily:

Map.prototype.update = function(iter) {
  Map(iter).forEach((v,k)=>this.set(k,v));
};
Set.prototype.update = function(iter) {
  Set(iter).forEach(v=>this.add(v));
};

I've used this kind of dict/set addition in Python plenty, and added
the method to my Map polyfill that I use for some personal projects.

Thoughts?

~TJ

Has it been discussed yet to add an .update() method to Map and Set, a
la Python, which take an iterable (yielding [key, value] for Map, and
just value for Set) and add the iterable's entries to the Map/Set?

It desugars easily:

```js
Map.prototype.update = function(iter) {
  Map(iter).forEach((v,k)=>this.set(k,v));
};
Set.prototype.update = function(iter) {
  Set(iter).forEach(v=>this.add(v));
};
```

I've used this kind of dict/set addition in Python plenty, and added
the method to my Map polyfill that I use for some personal projects.

Thoughts?