Add toMapKey() method

[stickfigure]

A minor feature request:

IMO, the streams designers made one ergonomic mistake - the one-argument toMap() method takes a valuemapper instead of a keymapper. I guess they flipped a coin? In my entire life I have never used the one-argument valuemapper, but I write this all the time:

toMap(Thing::getKey, Function.identity())

It would be more ergonomic to simply write:

toMapKey(Thing::getKey)

(or any other method name; it doesn't have to be toMapKey)

It would be lovely if StreamEx added this little convenience method. Thanks!

[amaembo]

Thanks. I renamed methods to valuesToMap(), valuesToSortedMap() and valuesToNavigableMap().

[stickfigure]

That's great, thanks!