aoc2024/day-06/internal/two/util.go
onyx-and-iris 08706ecc11 make use of graph factory function.
move isLoop logic into guard clause.
2024-12-06 22:23:01 +00:00

36 lines
563 B
Go

package two
import (
"bufio"
"io"
"strings"
)
func parseLines(r io.Reader) (*graph, error) {
graph := &graph{}
count := 0
scanner := bufio.NewScanner(r)
for scanner.Scan() {
line := scanner.Text()
indx := strings.Index(line, "^")
if indx != -1 {
graph.startPoint = point{indx, count, N}
}
graph.data = append(graph.data, scanner.Text())
count++
}
if err := scanner.Err(); err != nil {
return nil, err
}
return graph, nil
}
func replaceAtIndex(s string, r rune, i int) string {
out := []rune(s)
out[i] = r
return string(out)
}