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optimize parsing

This commit is contained in:
kageru 2022-12-14 23:46:52 +01:00
parent 2dd0df251f
commit a4ad70ddd3
Signed by: kageru
GPG Key ID: 8282A2BEA4ADA3D2
1 changed files with 4 additions and 3 deletions
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7
2022/src/bin/day14.rs
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@ -14,15 +14,16 @@ type Parsed = (Cave, usize);
fn parse_input(raw: &str) -> Parsed {
let mut cave = [[false; CAVE_HEIGHT]; CAVE_WIDTH];
let mut max_y = 0;
let mut segments: Vec<(usize, usize)> = Vec::with_capacity(10);
for line in raw.lines() {
let segments: Vec<(usize, usize)> =
line.split(" -> ").map(|s| s.split_once(',').unwrap()).map(|(x, y)| (parse_num::<usize>(x) - X_OFFSET, parse_num(y))).collect();
segments
.extend(line.split(" -> ").map(|s| s.split_once(',').unwrap()).map(|(x, y)| (parse_num::<usize>(x) - X_OFFSET, parse_num(y))));
for &[(x1, y1), (x2, y2)] in segments.array_windows() {
max_y = max_y.max(y1).max(y2);
for (x, y) in ((x1.min(x2))..=(x1.max(x2))).flat_map(|x| repeat(x).zip((y1.min(y2))..=(y1.max(y2)))) {
cave[x][y] = true;
}
}
max_y = max_y.max(segments.drain(..).map(|(_, y)| y).max().unwrap());
}
(cave, max_y)
}