布尔数组到字节数组

Question

我有将字节数组转换为表示 0 和 1 的 bool 数组的函数：

func byteArrayToBoolArray(ba []byte) []bool {

    var s []bool

    for _, b := range ba {

        for _, c := range strconv.FormatUint(uint64(by), 2) {

            s = append(s, c == []rune("1")[0])

        }

    }

    return s

}

一个函数怎么看起来恰恰相反，意味着将 bool 数组转换为字节数组？

编辑：这个游乐场提供了我的字节数组的更多细节：https://play.golang.org/p/tEDcZv-t_0Q

ba := []byte{123, 255}

Answer 1

例如，boolsToBytes的倒数（恰好相反）bytesToBools，package mainimport (&nbsp; &nbsp; "fmt")func boolsToBytes(t []bool) []byte {&nbsp; &nbsp; b := make([]byte, (len(t)+7)/8)&nbsp; &nbsp; for i, x := range t {&nbsp; &nbsp; &nbsp; &nbsp; if x {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; b[i/8] |= 0x80 >> uint(i%8)&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; }&nbsp; &nbsp; return b}func bytesToBools(b []byte) []bool {&nbsp; &nbsp; t := make([]bool, 8*len(b))&nbsp; &nbsp; for i, x := range b {&nbsp; &nbsp; &nbsp; &nbsp; for j := 0; j < 8; j++ {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (x<<uint(j))&0x80 == 0x80 {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; t[8*i+j] = true&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; }&nbsp; &nbsp; return t}func main() {&nbsp; &nbsp; b := []byte{123, 255}&nbsp; &nbsp; fmt.Println(b)&nbsp; &nbsp; t := bytesToBools(b)&nbsp; &nbsp; fmt.Printf("%t\n", t)&nbsp; &nbsp; b = boolsToBytes(t)&nbsp; &nbsp; fmt.Println(b)}游乐场：https://play.golang.org/p/IguJ_4cZKtA输出：[123 255][false true true true true false true true true true true true true true true true][123 255]该问题提供了一个函数并要求一个反函数（完全相反）函数。问题函数算法存在缺陷，多个输入映射到相同的函数值。因此，不存在唯一的逆。package mainimport (&nbsp; &nbsp; "fmt"&nbsp; &nbsp; "strconv")func byteArrayToBoolArray(ba []byte) []bool {&nbsp; &nbsp; var s []bool&nbsp; &nbsp; for _, b := range ba {&nbsp; &nbsp; &nbsp; &nbsp; for _, c := range strconv.FormatUint(uint64(b), 2) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; s = append(s, c == []rune("1")[0])&nbsp; &nbsp; &nbsp; &nbsp; }&nbsp; &nbsp; }&nbsp; &nbsp; return s}func main() {&nbsp; &nbsp; ba1 := []byte{0xF}&nbsp; &nbsp; fmt.Println(byteArrayToBoolArray(ba1))&nbsp; &nbsp; ba2 := []byte{0x3, 0x3}&nbsp; &nbsp; fmt.Println(byteArrayToBoolArray(ba2))&nbsp; &nbsp; ba3 := []byte{0x1, 0x1, 0x1, 0x1}&nbsp; &nbsp; fmt.Println(byteArrayToBoolArray(ba3))}游乐场：https://play.golang.org/p/L9VsTtbkQZW输出：[true true true true][true true true true][true true true true]