README.md

damm checksum algorithm

Usage

import "github.com/jancajthaml-go/damm"

ok := damm.Validate("00123014764700968325")

digit, error := damm.Digit("x")

checksum := damm.Generate("1")

Performance

BenchmarkDammSmall-4           500000000    3.80 ns/op   0 B/op   0 allocs/op
BenchmarkDammLarge-4           50000000     38.5 ns/op   0 B/op   0 allocs/op
BenchmarkDammSmallParallel-4   1000000000   2.09 ns/op   0 B/op   0 allocs/op
BenchmarkDammLargeParallel-4   100000000    15.2 ns/op   0 B/op   0 allocs/op

verify your performance by running make benchmark

Resources

• Wikipedia - Damm algorithm