September Morn Update

Task/Matrix-transposition/Rust/matrix-transposition-2.rust

@@ -0,0 +1,25 @@
+fn main() {
+    let m = vec![vec![1, 2, 3], vec![4, 5, 6]];
+    println!("Matrix:\n{}", matrix_to_string(&m));
+    let t = matrix_transpose(m);
+    println!("Transpose:\n{}", matrix_to_string(&t));
+}
+
+fn matrix_to_string(m: &Vec<Vec<i32>>) -> String {
+    m.iter().fold("".to_string(), |a, r| {
+        a + &r
+            .iter()
+            .fold("".to_string(), |b, e| b + "\t" + &e.to_string())
+            + "\n"
+    })
+}
+
+fn matrix_transpose(m: Vec<Vec<i32>>) -> Vec<Vec<i32>> {
+    let mut t = vec![Vec::with_capacity(m.len()); m[0].len()];
+    for r in m {
+        for i in 0..r.len() {
+            t[i].push(r[i]);
+        }
+    }
+    t
+}