bloom

package module

v0.0.0-...-3d94ea1 Latest Latest Go to latest Published: Mar 5, 2024 License: MIT Imports: 8 Imported by: 0

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func K(m, n uint32) uint32

K calculates number of hash functions m is a size of bitset n is an expected number of elements

func M(n int, p float64) uint32

M calculates size of bitset n is an expected number of elements p is a false alarm probability

type Bloom struct {
	// contains filtered or unexported fields
}

Bloom is an implementation of bloom filter

func New(n int, p float64) *Bloom

New create a new instance of the bloom filter n is expected number of elements p is false alarm probability

func (b *Bloom) Add(k []byte)

Add the key to the bloom filter k is the key of the element

func (b *Bloom) Contains(k []byte) bool

Contains checks for the presence of an element in the bloom filter k is the key of the element

func (b *Bloom) ReadFrom(r io.Reader) (n int64, err error)

ReadFrom reads the bloom filter from the reader

func (b *Bloom) Union(a *Bloom) (err error)

Union two different bloom filters with the same size and number of hash functions

func (b *Bloom) WriteTo(w io.Writer) (n int64, err error)

WriteTo writes the bloom filter in a writer

Path	Synopsis
murmur