More on arrays in JS

Following up from 2D array video #46, this interesting solution was pointed out to me in the YouTube comments:

``` javascript
make2Darr = function(r, c) {
return new Array(c).fill([]).map(e => new Array(r));
}
```

Would love to investigate `fill()` and `map()` in a future video. What else? There is also #89 which relates to this topic.

Review the 2D array video referenced as #46, the related issue #89, and the proposed JavaScript snippet. Decide whether a future video should cover fill() and map(), then define the topic scope and what the completed video should explain.

Vom Indexierungsmodell aus dem Issue-Text verfasst.