Data commit

Task/Spiral-matrix/Rust/spiral-matrix.rust

@@ -0,0 +1,27 @@
+const VECTORS: [(isize, isize); 4] = [(1, 0), (0, 1), (-1, 0), (0, -1)];
+
+pub fn spiral_matrix(size: usize) -> Vec<Vec<u32>> {
+    let mut matrix = vec![vec![0; size]; size];
+    let mut movement = VECTORS.iter().cycle();
+    let (mut x, mut y, mut n) = (-1, 0, 1..);
+
+    for (move_x, move_y) in std::iter::once(size)
+        .chain((1..size).rev().flat_map(|n| std::iter::repeat(n).take(2)))
+        .flat_map(|steps| std::iter::repeat(movement.next().unwrap()).take(steps))
+    {
+        x += move_x;
+        y += move_y;
+        matrix[y as usize][x as usize] = n.next().unwrap();
+    }
+
+    matrix
+}
+
+fn main() {
+    for i in spiral_matrix(4).iter() {
+        for j in i.iter() {
+            print!("{:>2} ", j);
+        }
+        println!();
+    }
+}