Initial data commit

Task/Determinant-and-permanent/JavaScript/determinant-and-permanent.js

@@ -0,0 +1,29 @@
+const determinant = arr =>
+    arr.length === 1 ? (
+        arr[0][0]
+    ) : arr[0].reduce(
+        (sum, v, i) => sum + v * (-1) ** i * determinant(
+            arr.slice(1)
+            .map(x => x.filter((_, j) => i !== j))
+        ), 0
+    );
+
+const permanent = arr =>
+    arr.length === 1 ? (
+        arr[0][0]
+    ) : arr[0].reduce(
+        (sum, v, i) => sum + v * permanent(
+            arr.slice(1)
+            .map(x => x.filter((_, j) => i !== j))
+        ), 0
+    );
+
+const M = [
+    [0, 1, 2, 3, 4],
+    [5, 6, 7, 8, 9],
+    [10, 11, 12, 13, 14],
+    [15, 16, 17, 18, 19],
+    [20, 21, 22, 23, 24]
+];
+console.log(determinant(M));
+console.log(permanent(M));