Adds a vector with a key to the index.

index: A usearch index. key: An integer key vec: A vector to add to the index.

The currently reserved capacity of index.

Creates a new index with opts.

If vecs are provided, they will be added to index. vecs should be a sequence of key, vec pairs.

Required:

:dimensions Length of vectors that will be indexed :metric The metric used to measure distance. One of :metric/cos :metric/divergence :metric/hamming :metric/haversine :metric/ip :metric/jaccard :metric/l2sq :metric/pearson :metric/sorensen :metric/tanimoto :quantization The datatype for the vectors that will be indexed. One of :quantization/f32 :quantization/f64 :quantization/i8

Optional:

:connectivity limits connections-per-node in graph :expansions-add expansion factor used for index construction when adding vectors. :expansions-search used for index construction during search operations.

Loads the index from path. index must have already been initialized.

Removes the vector associated with the given key from the index.

Renames the vector to map to a different key.

Sets capacity to capacity.

Has no effect if capacity is lower than the index's current capacity.

Saves index to a file at path.

Performs k-Approximate Nearest Neighbors (kANN) Search for closest vectors to query.

Returns a map of the n closest matches. The keys are the keys and values are the distances.

If no n is provided, returns the closest match.

Reports expected file size after serialization.

Number of indexed vectors.