bitcoinAddressLengthStats.go

package main

import (
	"bufio"
	"flag"
	"fmt"
	"os"
	"strings"
)

var (
	path  = flag.String("path", "", "")
	debug = flag.Bool("debug", false, "")
)

func init() {
	flag.Parse()

	if path == nil || len(*path) == 0 {
		panic("path to config file is required")
	}
}

func main() {
	inFile, err := os.Open(*path)
	if err != nil {
		panic(err)
	}

	defer inFile.Close()

	scanner := bufio.NewScanner(inFile)
	scanner.Split(bufio.ScanLines)

	stats := make(map[int]int64)
	var total int64
	for scanner.Scan() {
		line := scanner.Text()
		addresses := strings.Split(line, ";")[0]

		address := addresses
		if strings.Contains(addresses, ":") {
			address = strings.Split(addresses, ":")[0]
		}

		length := len(address)

		stats[length]++
		total++

		if !*debug {
			continue
		}

		if total%1e3 == 0 {
			if total%1e6 == 0 {
				fmt.Printf("\n%dM ", total/1e6)
				continue
			}

			fmt.Print(".")
		}
	}

	for length := 34; length > 0; length-- {
		cnt, ok := stats[length]
		if !ok {
			continue
		}

		fmt.Printf("\n%d characters:\t%d (%.5f%%)", length, cnt, float64(cnt)/float64(total)*100)
	}
}