Dart 3 - Iterable.indexed

Randal Schwartz shows off a new Dart 3 feature to add index numbers to an iterable with minimal fuss.

[wembleyleach]

I’ve been waiting for this change. Thanks for sharing!

[garyhunter]

Great tip ...so common to need an index with an item and this finally makes it simple ...enjoying all your videos, you've got a great way of breaking stuff down & explaining it

[ChristianZaefferer]

Would it be possible to destructure a record directly in a function declaration? So something like this:
final numberedWords = words (dot) indexed (dot) map( ( ??? ) => '#$index is $word');

[elijahluckey]

Thanks for sharing this find! I certainly would not have found it until much later. Also with the "IterableExtensions" (where this ".indexed" lives) we get a few of the other handy features from the "collection" package - several of the "..OrNull" getters.

[sambaotaku]

I don't understand why collection is a package.

I thought that was to try new functions to include in the dart language later in a optimized way, but is not like the package has to many updates.

[conceptcoder]

Hi Randal, please give more zoom for your code, my eyes really hurts to see and understand your amazing tricks...

[flipside-games]

Wow great tips! I learnt a lot from this. I never knew you could nest a for loop inside an array instantiation like in example 1.