Changes signature of Iterable.singleWhere.
Makes LinkedHashMap no longer be a HashMap.
Change-Id: Ibd7e56e1ac03cb9fb10d19d1328d452fcd06d89f
Reviewed-on: https://dart-review.googlesource.com/32541
Commit-Queue: Lasse R.H. Nielsen <lrn@google.com>
Reviewed-by: Leaf Petersen <leafp@google.com>
- string/int keys use identity maps
- construct the correct type rather than relying on factory constructors when possible
- checks if key has identity semantics and use that when possible
- avoid helper calls/casts/etc in implementations
- use native ES6 Map/Set key order tracking
- optimized constructor for map literals
- fixes#30466, const maps are now canonicalized correctly
Change-Id: Id44acf3d9bf8cb153a4755aa28df08fe91bfc633
Reviewed-on: https://dart-review.googlesource.com/8167
Reviewed-by: Vijay Menon <vsm@google.com>
Lasse R.H. Nielsen