btree

btree

import "github.com/zyedidia/generic/btree"

Package btree provides an implementation of a B-tree. A B-tree is a logarithmic search tree that maintains key-value pairs in sorted order. It is not binary because it stores more than 2 data entries per node. The branching factor for this tree is 64.

Example

package main

import (
	"fmt"

	g "github.com/zyedidia/generic"
	"github.com/zyedidia/generic/btree"
)

func main() {
	tree := btree.New[int, string](g.Less[int])

	tree.Put(42, "foo")
	tree.Put(-10, "bar")
	tree.Put(0, "baz")

	tree.Each(func(key int, val string) {
		fmt.Println(key, val)
	})

}

Output

-10 bar
0 baz
42 foo

Index

• type Tree
  • func New[K, V any](less g.LessFn[K]) *Tree[K, V]
  • func (t *Tree[K, V]) Each(fn func(key K, val V))
  • func (t *Tree[K, V]) Get(key K) (V, bool)
  • func (t *Tree[K, V]) Put(key K, val V)
  • func (t *Tree[K, V]) Remove(key K)
  • func (t *Tree[K, V]) Size() int

type Tree

Tree implements a B-tree.

type Tree[K, V any] struct {
    // contains filtered or unexported fields
}

func New

func New[K, V any](less g.LessFn[K]) *Tree[K, V]

New returns an empty B-tree.

func (*Tree[K, V]) Each

func (t *Tree[K, V]) Each(fn func(key K, val V))

Each calls 'fn' on every node in the tree in order.

func (*Tree[K, V]) Get

func (t *Tree[K, V]) Get(key K) (V, bool)

Get returns the value associated with 'key'.

func (*Tree[K, V]) Put

func (t *Tree[K, V]) Put(key K, val V)

Put associates 'key' with 'val'.

func (*Tree[K, V]) Remove

func (t *Tree[K, V]) Remove(key K)

Remove removes the value associated with 'key'.

func (*Tree[K, V]) Size

func (t *Tree[K, V]) Size() int

Size returns the number of elements in the tree.

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