행렬의 곱셈, 심화

Author: unn04012

unn04012/array/Matrix_multiplication.js

@@ -0,0 +1,31 @@
+function solution(arr1, arr2) {
+  const n = arr1.length;
+  const m = arr2[0].length;
+
+  const answer = Array.from({ length: n }, () => Array(m).fill(0));
+
+  for (let i = 0; i < n; i++) {
+    for (let j = 0; j < m; j++) {
+      const result = arr1[i].reduce((acc, cur, idx) => acc + cur * arr2[idx][j], 0);
+
+      answer[i][j] = result;
+    }
+  }
+
+  return answer;
+}
+
+console.log(
+  solution(
+    [
+      [2, 3, 2],
+      [4, 2, 4],
+      [3, 1, 4],
+    ],
+    [
+      [5, 4, 3],
+      [2, 4, 1],
+      [3, 1, 1],
+    ]
+  )
+);