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Go RLE encoder/decoder
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| package main | |
| import ( | |
| "errors" | |
| "fmt" | |
| "strconv" | |
| ) | |
| func rleEncode(input string) (string, error) { | |
| if len(input) == 0 { | |
| return "", errors.New("Input is empty") | |
| } | |
| result := "" | |
| count := 1 | |
| for i := 1; i < len(input); i++ { | |
| if input[i] == input[i-1] { | |
| count++ | |
| } else { | |
| result += strconv.Itoa(count) + string(input[i-1]) | |
| count = 1 | |
| } | |
| } | |
| result += strconv.Itoa(count) + string(input[len(input)-1]) | |
| return result, nil | |
| } | |
| func rleDecode(input string) (string, error) { | |
| if len(input) == 0 { | |
| return "", errors.New("Input is empty") | |
| } | |
| result := "" | |
| count := 0 | |
| for i := 0; i < len(input); i++ { | |
| if input[i] >= '0' && input[i] <= '9' { | |
| count = count*10 + int(input[i]-'0') | |
| } else { | |
| for j := 0; j < count; j++ { | |
| result += string(input[i]) | |
| } | |
| count = 0 | |
| } | |
| } | |
| return result, nil | |
| } | |
| func main() { | |
| input := "aaaaaaabbbbccc" | |
| encoded, err := rleEncode(input) | |
| if err != nil { | |
| fmt.Println(err) | |
| return | |
| } | |
| fmt.Println(encoded) | |
| decoded, err := rleDecode(encoded) | |
| if err != nil { | |
| fmt.Println(err) | |
| return | |
| } | |
| fmt.Println(decoded) | |
| } |
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