flatMap - Functional JavaScript - Supercharged

In this mini series, Surma introduces you to the various functional methods that JavaScript Arrays have to offer. In this episode: flatMap!

[AdamsTaiwan]

Would be nice to see what the result data set might look like

[MrTurbo_]

I had to listen to this 3 times but I get it now, quite cool, could have used that earlier today

[ehsan_kia]

can you also use this to return values for only some items, by returning an empty list? I usually have to use a map followed by a filter to prune empty values.

[eeqhxly]

Hello 👋, why you not show result on in videos? It will be nice... thx for video!

[ocramot]

Does flatMap removes or keeps duplicates? It's not clear by your example :)

[GCoda]

1337
is it going to be faster than doing .reduce(a, c => a.concat) ?
or this just sugar?

[RafaelCouto]

Great Vid!!! I know i'm being picky, but please replace those "i" in the last line for something more semantic.

[dennishein]

It does not filter out duplicates though, right? So if I had multiple orders with "toothpaste" it would appear multiple times in the result.

[qwiglydee]

MDN warns: Experimental. Expect behavior to change in the future.

is it in some standard yet?

[beckycasandra]

I think there is no output, it make me feel so sad in thr end

[danielevans]

Poorly explained. An example output of items (line 18 from 0:58) would have helped.

[fedes]

Why just not code in scala.js altogether xD

[AdamSchelenbergCom]

Was the point to show people how you flatMap the armchair?