A small refactor

src/days/day11.rs

@@ -27,7 +27,7 @@ impl FromStr for Chart {
 }
 
 impl Chart {
-    fn detect_doubles(&mut self) {
+    fn detect_empties(&mut self) {
         for x in 0..self.stride {
             if self.space.iter().skip(x).step_by(self.stride).all(|c| *c == '.') {
                 self.empty_columns.insert(x);
@@ -51,47 +51,43 @@ impl Chart {
         vec
     }
 
-    fn distance(&self, c1: &(usize, usize), c2: &(usize, usize), extra_distance: u64) -> u64 {
+    fn distance(&self, c1: &(usize, usize), c2: &(usize, usize), empty_distance: u64) -> u64 {
         let mut steps = 0;
         for x in (min(c1.0, c2.0)..=max(c1.0, c2.0)).into_iter().skip(1) {
-            steps += 1;
             if self.empty_columns.contains(&x) {
-                steps += extra_distance;
+                steps += empty_distance;
+            } else {
+                steps += 1;
             }
         }
         for y in (min(c1.1, c2.1)..=max(c1.1, c2.1)).into_iter().skip(1) {
-            steps += 1;
             if (self.empty_rows).contains(&y) {
-                steps += extra_distance;
+                steps += empty_distance;
+            } else {
+                steps += 1;
             }
         }
         steps
     }
 }
 
-pub fn one() -> Result<u64, AdventError> {
+pub fn solve(empty_distance: u64) -> Result<u64, AdventError> {
     let mut chart = read_into::<Chart>(Path::new("resources/input11.txt"))?;
-    chart.detect_doubles();
+    chart.detect_empties();
     let galaxy_coords = chart.find_galaxys();
     let mut sum: u64 = 0;
     for (i, c1) in galaxy_coords.iter().enumerate() {
         for c2 in galaxy_coords.iter().skip(i+1) {
-            sum += chart.distance(c1, c2, 2-1);
+            sum += chart.distance(c1, c2, empty_distance);
         }
     }
-    Ok(sum as u64)
+    Ok(sum)
 }
 
+pub fn one() -> Result<u64, AdventError> {
+    solve(2)
+}
 
 pub fn two() -> Result<u64, AdventError> {
-    let mut chart = read_into::<Chart>(Path::new("resources/input11.txt"))?;
-    chart.detect_doubles();
-    let galaxy_coords = chart.find_galaxys();
-    let mut sum: u64 = 0;
-    for (i, c1) in galaxy_coords.iter().enumerate() {
-        for c2 in galaxy_coords.iter().skip(i+1) {
-            sum += chart.distance(c1, c2, 1000000-1); 
-        }
-    }
-    Ok(sum as u64)
+    solve(1000000)
 }