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28 lines
558 B
Go
28 lines
558 B
Go
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package main
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import (
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"fmt"
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"regexp"
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"strconv"
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)
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// one takes a string array and for each line:
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// Combine the first digit and the last digit (in that order) to form a single two-digit number.
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// Returns the sum of all calibrated values.
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func one(lines []string) (int, error) {
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re := regexp.MustCompile(`\d`)
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sum := 0
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for _, line := range lines {
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m := re.FindAllString(line, -1)
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if len(m) > 0 {
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num, err := strconv.Atoi(fmt.Sprintf("%s%s", m[0], m[len(m)-1]))
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if err != nil {
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return 0, err
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}
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sum += num
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}
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}
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return sum, nil
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}
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