fix encoding to zero

This commit is contained in:
Arnas Udovic 2024-08-08 14:53:11 +03:00
parent 7bd5c7ec48
commit c11c23dd98
4 changed files with 58 additions and 36 deletions

5
CHANGELOG.md Normal file
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# v1.0.1
2024-08-08
* fix encoding to zero

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package abcex package abcex
import "fmt" import (
import "math" "fmt"
"math"
)
var decToAbcex = map[int]string{ var decToAbcex = map[int]string{
0: "0", 1: "1", 2: "2", 3: "3", 4: "4", 5: "5", 6: "6", 7: "7", 0: "0", 1: "1", 2: "2", 3: "3", 4: "4", 5: "5", 6: "6", 7: "7",
8: "8", 9: "9", 10: "a", 11: "b", 12: "c", 13: "d", 14: "e", 8: "8", 9: "9", 10: "a", 11: "b", 12: "c", 13: "d", 14: "e",
15: "f", 16: "g", 17: "h", 18: "i", 19: "j", 20: "k", 21: "l", 15: "f", 16: "g", 17: "h", 18: "i", 19: "j", 20: "k", 21: "l",
22: "m", 23: "n", 24: "o", 25: "p", 26: "q", 27: "r", 28: "s", 22: "m", 23: "n", 24: "o", 25: "p", 26: "q", 27: "r", 28: "s",
29: "t", 30: "u", 31: "v", 32: "w", 33: "x", 34: "y", 35: "z" } 29: "t", 30: "u", 31: "v", 32: "w", 33: "x", 34: "y", 35: "z",
}
var abcexToDec = flipMap() var abcexToDec = flipMap()
func reverse(s string) string { func reverse(s string) string {
runes := []rune(s) runes := []rune(s)
for i, j := 0, len(runes)-1; i < j; i, j = i+1, j-1 { for i, j := 0, len(runes)-1; i < j; i, j = i+1, j-1 {
runes[i], runes[j] = runes[j], runes[i] runes[i], runes[j] = runes[j], runes[i]
} }
return string(runes) return string(runes)
} }
func flipMap() map[string]int { func flipMap() map[string]int {
flipped := make(map[string]int) flipped := make(map[string]int)
for i, val := range decToAbcex { for i, val := range decToAbcex {
flipped[val] = i flipped[val] = i
}
return flipped
}
func Encode(number int64) string{
result := ""
for number > 0 {
result = fmt.Sprintf("%s%s", decToAbcex[int(number % 36)], result)
number /= 36
} }
return result return flipped
}
func Encode(number int64) string {
if number == 0 {
return "0"
}
result := ""
for number > 0 {
result = fmt.Sprintf("%s%s", decToAbcex[int(number%36)], result)
number /= 36
}
return result
} }
func Decode(str string) int64 { func Decode(str string) int64 {
var result int64 var result int64
result = 0 result = 0
str = reverse(str) str = reverse(str)
for i, c := range str { for i, c := range str {
result = int64(math.Pow(36, float64(i))) * int64(abcexToDec[string(c)]) + result result = int64(math.Pow(36, float64(i)))*int64(abcexToDec[string(c)]) + result
} }
return result return result
} }

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package abcex package abcex
import "fmt" import (
import "testing" "fmt"
"testing"
)
func TestEncode(t *testing.T) { func TestEncode(t *testing.T) {
fmt.Println(Encode(12345)) fmt.Println(Encode(12345))
// Output: 9ix // Output: 9ix
} }
func TestDecode(t *testing.T) { func TestDecode(t *testing.T) {
fmt.Println(Decode("9ix")) fmt.Println(Decode("9ix"))
// Output: 12345 // Output: 12345
}
func TestZero(t *testing.T) {
fmt.Println(Encode(0))
// Output: 0
fmt.Println(Decode("0"))
// Output: 0
} }