Caffeinating still, obvious bugfix below:

Brendan Eich wrote:
> ```js
> Object.defineProperty(%CollectionPrototype%, 'map', {
>     value: function (fun) {
>         let result = new this.constructor();
>         for (let [key, val] of this) {
>             result.set(key, val); 

```js
             result.set(key, fun(val, key));
```

I call the mapfun in these examples with (val, key) -- could use the 
e-i-c convention from the Array extras but I was in a hurry (wherefore 
this bug).

/be

Caffeinating still, obvious bugfix below:

Brendan Eich wrote:
> ```js
> result.set(key, val); 
> ```

```js
result.set(key, fun(val, key));
```

I call the mapfun in these examples with (val, key) -- could use the 
e-i-c convention from the Array extras but I was in a hurry (wherefore 
this bug).