matrix_multiplication / 고급

Author: Moonjonghoo

Moonjonghoo/array/matrix_multiplication.js

@@ -0,0 +1,17 @@
+function solution(arr1, arr2) {
+  const newArr = [];
+
+  for (let i = 0; i < arr1.length; i++) {
+    let result = [];
+    for (let j = 0; j < arr2[0].length; j++) {
+      let elem = 0;
+      for (let k = 0; k < arr2.length; k++) {
+        // arr1[0].length도 가능.
+        elem += arr1[i][k] * arr2[k][j];
+      }
+      result.push(elem);
+    }
+    newArr.push(result);
+  }
+  return newArr;
+}