shuo 1dc713b605 add len, is_empty, iter method on SparseSets, make SparseSets inspect… (#7638) ... …able like Table. Rename clear to clear_entities to clarify that metadata keeps, only value cleared # Objective - Provide some inspectability for SparseSets. ## Solution - `Tables` has these three methods, len, is_empty and iter too. Add these methods to `SparseSets`, so user can print the shape of storage. --- ## Changelog > This section is optional. If this was a trivial fix, or has no externally-visible impact, you can delete this section. - Add `len`, `is_empty`, `iter` methods on SparseSets. - Rename `clear` to `clear_entities` to clarify its purpose. - Add `new_for_test` on `ComponentInfo` to make test code easy. - Add test case covering new methods. ## Migration Guide > This section is optional. If there are no breaking changes, you can delete this section. - Simply adding new functionality is not a breaking change.		2023-02-15 23:52:02 +00:00
..
blob_vec.rs	Add safety comments to usages of byte_add (Ptr, PtrMut, OwningPtr) (#7214)	2023-01-16 20:35:15 +00:00
mod.rs	Panic on dropping NonSend in non-origin thread. (#6534)	2023-01-09 20:40:34 +00:00
resource.rs	Add World::clear_resources & World::clear_all (#3212)	2023-01-17 04:20:42 +00:00
sparse_set.rs	add len, is_empty, iter method on SparseSets, make SparseSets inspect… (#7638)	2023-02-15 23:52:02 +00:00
table.rs	add len, is_empty, iter method on SparseSets, make SparseSets inspect… (#7638)	2023-02-15 23:52:02 +00:00