我有类似的东西

unixtime := time.Now().Unix()

unixtimeStr := string(unixtime)

soup := make([]byte, len(data) + len(nonce) + len(unixtimeStr) + len(previousHash))

copy(soup[:], data)
copy(soup[len(data):], nonce)
copy(soup[len(data) + len(nonce):], []byte(unixtimeStr))
copy(soup[len(data) + len(nonce) + len(unixtimeStr):], previousHash)

hasher := sha1.New()
hasher.Write(soup)
var hash []byte = hasher.Sum(nil)
datanoncepreviousHash的类型为[]byte

我觉得它很脏而且不可读!

我想要一种更面向对象的编码风格,例如
soup := data.concat(nonce).concat([]byte(unixtimeStr)).concat(previousHash)

或至少像
soup := concat(data, nonce, ...)

您将如何编写此代码段?

最佳答案

例如,

var data, nonce, previousHash []byte

unixtime := strconv.FormatInt(time.Now().Unix(), 10)
hasher := sha1.New()
hasher.Write(data)
hasher.Write(nonce)
hasher.Write([]byte(unixtime))
hasher.Write(previousHash)
hash := hasher.Sum(nil)

或者,
var data, nonce, previousHash []byte

unixtime := strconv.FormatInt(time.Now().Unix(), 10)
soup := make([]byte, 0, len(data)+len(nonce)+len(unixtime)+len(previousHash))
soup = append(soup, data...)
soup = append(soup, nonce...)
soup = append(soup, unixtime...)
soup = append(soup, previousHash...)
hasher := sha1.New()
hasher.Write(soup)
hash := hasher.Sum(nil)

笔记:
unixtime := time.Now().Unix()
unixtimeStr := string(unixtime)

是荒谬的。始终是Unicode替换字符。例如,
package main

import (
    "fmt"
    "time"
    "unicode"
)

func main() {
    unixtime := time.Now().Unix()
    unixtimeStr := string(unixtime)
    fmt.Println(unixtimeStr == string(unicode.ReplacementChar))
}

输出:
true

要将整数转换为字符串,请使用strconv包。例如,
package main

import (
    "fmt"
    "strconv"
    "time"
)

func main() {
    unixtimeStr := strconv.FormatInt(time.Now().Unix(), 10)
    fmt.Println(unixtimeStr)
}

输出:
1257894000

关于go - 连接[] byte和哈希,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/54610384/

10-09 03:49