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iterator.go
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/
iterator.go
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//
// Copyright (C) 2024 Dmitry Kolesnikov
//
// This file may be modified and distributed under the terms
// of the MIT license. See the LICENSE file for details.
// https://github.com/fogfish/hnsw
//
package hnsw
import (
"fmt"
"strings"
)
type FMap[Vector any] func(level int, vector Vector, vertex []Vector) error
func (h *HNSW[Vector]) FMap(level int, fmap FMap[Vector]) error {
for _, node := range h.heap {
if len(node.Connections) > level {
vertex := make([]Vector, len(node.Connections[level]))
for i, addr := range node.Connections[level] {
vertex[i] = h.heap[addr].Vector
}
if err := fmap(len(node.Connections), node.Vector, vertex); err != nil {
return err
}
}
}
return nil
}
func (h *HNSW[Vector]) Dump(sb *strings.Builder) {
for lvl := h.level - 1; lvl >= 0; lvl-- {
sb.WriteString(fmt.Sprintf("\n\n==> %v\n", lvl))
h.FMap(lvl, func(level int, vector Vector, vertex []Vector) error {
sb.WriteString(fmt.Sprintf("%v | ", vector))
for _, e := range vertex {
sb.WriteString(fmt.Sprintf("%v ", e))
}
sb.WriteString("\n")
return nil
})
}
}