[top] / BTrees / Interfaces / IMergeIntegerKey
IMerge-able objects with integer keys.
Concretely, this means the types in IOBTree and IIBTree.
There are no attributes or fields specified.
union(c1, c2)
Compute the Union of c1 and c2.
If c1 is None, then c2 is returned, otherwise, if c2 is None, then c1 is returned.
The output is a Set containing keys from the input collections.
difference(c1, c2)
Return the keys or items in c1 for which there is no key in c2.
If c1 is None, then None is returned. If c2 is None, then c1 is returned.
If neither c1 nor c2 is None, the output is a Set if c1 is a Set or TreeSet, and is a Bucket if c1 is a Bucket or BTree.
intersection(c1, c2)
Compute the intersection of c1 and c2.
If c1 is None, then c2 is returned, otherwise, if c2 is None, then c1 is returned.
The output is a Set containing matching keys from the input collections.
multiunion(seq)
Return union of (zero or more) integer sets, as an integer set.
seq is a sequence of objects each convertible to an integer set. These objects are convertible to an integer set:
+ An integer, which is added to the union.
+ A Set or TreeSet from the same module (for example, an IIBTree.TreeSet for IIBTree.multiunion()). The elements of the set are added to the union.
+ A Bucket or BTree from the same module (for example, an IOBTree.IOBTree for IOBTree.multiunion()). The keys of the mapping are added to the union.
The union is returned as a Set from the same module (for example, IIBTree.multiunion() returns an IIBTree.IISet).
The point to this method is that it can run much faster than doing a sequence of two-input union() calls. Under the covers, all the integers in all the inputs are sorted via a single linear-time radix sort, then duplicates are removed in a second linear-time pass.
There are no specific adapters registered for this interface.
There are no extended adapters registered for this interface.
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