fix encoding to zero

CHANGELOG.md

@@ -0,0 +1,5 @@
+# v1.0.1
+
+2024-08-08 
+
+* fix encoding to zero

README.md

@@ -2,4 +2,4 @@
 
 [![Build Status](https://drone.arns.lt/api/badges/zordsdavini/abcex/status.svg)](https://drone.arns.lt/zordsdavini/abcex)
 
-Computing system based on the number 36
+Computing system based on the number 36

abcex.go

@@ -1,53 +1,60 @@
 package abcex
 
-import "fmt"
-import "math"
+import (
+	"fmt"
+	"math"
+)
 
 var decToAbcex = map[int]string{
 	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",
 	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",
-	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()
 
 func reverse(s string) string {
-    runes := []rune(s)
-    for i, j := 0, len(runes)-1; i < j; i, j = i+1, j-1 {
-        runes[i], runes[j] = runes[j], runes[i]
-    }
-    return string(runes)
+	runes := []rune(s)
+	for i, j := 0, len(runes)-1; i < j; i, j = i+1, j-1 {
+		runes[i], runes[j] = runes[j], runes[i]
+	}
+	return string(runes)
 }
 
 func flipMap() map[string]int {
-    flipped := make(map[string]int)
-    for i, val := range decToAbcex {
-        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
+	flipped := make(map[string]int)
+	for i, val := range decToAbcex {
+		flipped[val] = i
 	}
 
-    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 {
-    var result int64
+	var result int64
 	result = 0
-    str = reverse(str)
+	str = reverse(str)
 
-    for i, c := range str {
-        result = int64(math.Pow(36, float64(i))) * int64(abcexToDec[string(c)]) + result
-    }
+	for i, c := range str {
+		result = int64(math.Pow(36, float64(i)))*int64(abcexToDec[string(c)]) + result
+	}
 
-    return result
+	return result
 }

abcex_test.go

@@ -1,14 +1,24 @@
 package abcex
 
-import "fmt"
-import "testing"
+import (
+	"fmt"
+	"testing"
+)
 
 func TestEncode(t *testing.T) {
-    fmt.Println(Encode(12345))
-    // Output: 9ix
+	fmt.Println(Encode(12345))
+	// Output: 9ix
 }
 
 func TestDecode(t *testing.T) {
-    fmt.Println(Decode("9ix"))
-    // Output: 12345
+	fmt.Println(Decode("9ix"))
+	// Output: 12345
+}
+
+func TestZero(t *testing.T) {
+	fmt.Println(Encode(0))
+	// Output: 0
+
+	fmt.Println(Decode("0"))
+	// Output: 0
 }