Created
December 4, 2023 17:42
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a broken program for solving day 1
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package main | |
import ( | |
"bufio" | |
"os" | |
"regexp" | |
"strconv" | |
"strings" | |
) | |
func main() { | |
data, err := os.Open("day1.txt") | |
if err != nil { | |
panic(err) | |
} | |
scanner := bufio.NewScanner(data) | |
calibration := 0 | |
for scanner.Scan() { | |
line := scanner.Text() | |
first_number := "" | |
last_number := "" | |
// part 2 | |
// scan for the first matching named number and replace it, repeat until there's no more matches | |
re := regexp.MustCompile(`(one|two|three|four|five|six|seven|eight|nine)`) | |
for match := re.FindString(line); match != ""; match = re.FindString(line) { | |
valueMap := make(map[string]rune) | |
valueMap["one"] = '1' | |
valueMap["two"] = '2' | |
valueMap["three"] = '3' | |
valueMap["four"] = '4' | |
valueMap["five"] = '5' | |
valueMap["six"] = '6' | |
valueMap["seven"] = '7' | |
valueMap["eight"] = '8' | |
valueMap["nine"] = '9' | |
if _, ok := valueMap[match]; !ok { | |
panic(line + match) | |
} | |
line = strings.Replace(line, match, string(valueMap[match]), 1) | |
} | |
for _, c := range line { | |
if _, err := strconv.Atoi(string(c)); err == nil { | |
if first_number == "" { | |
first_number = string(c) | |
} | |
last_number = string(c) | |
} | |
} | |
number, err := strconv.Atoi(first_number + last_number) | |
if err != nil { | |
panic(err) | |
} | |
calibration += number | |
} | |
if err := scanner.Err(); err != nil { | |
panic(err) | |
} | |
println("Calibration", calibration) | |
} |
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