[swift-evolution] map-like operation that returns a dictionary

[Kenny Leung]

Hi All.

I find that instead of using map() on arrays, I more often use an operation that returns a dictionary from an array. A common case is fetching an array of data, then creating a local cache of it indexed by ID.

Is there a name for this operation? Is this something that others would like to see added to the standard library?

-Kenny