Mainly for marking the underlying data array extent in SparseVector/SparseArray
Only iterates "active" keys
Only iterates "active" elements
Only iterates "active" elements.
Only iterates "active" elements. I'm not sure how I feel about this behavior, since it's inconsistent with the rest of Breeze. I will think on it.
Only iterates "active" elements
An ArrayLike is something that can behave kind of like an Array, but isn't. They have a fixed size and reasonably fast access times. The main difference is that they're sparse in one way or another. This includes breeze.collection.mutable.OpenAddressHashArrays and breeze.collection.mutable.SparseArray. They support several reasonable operations