From ac1a7376282eb6618a54582e22e19198eb9cbb3f Mon Sep 17 00:00:00 2001
From: Vignesh S <vignesh6993@live.in>
Date: Sun, 26 Jan 2020 11:55:48 +0530
Subject: [PATCH 1/3] Copy should be a static function

Copy returns a new matrix hence should be a static function
---
 lib/matrix.js | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/lib/matrix.js b/lib/matrix.js
index b232d36..62fade9 100644
--- a/lib/matrix.js
+++ b/lib/matrix.js
@@ -8,14 +8,14 @@ class Matrix {
     this.data = Array(this.rows).fill().map(() => Array(this.cols).fill(0));
   }
 
-  copy() {
-    let m = new Matrix(this.rows, this.cols);
-    for (let i = 0; i < this.rows; i++) {
-      for (let j = 0; j < this.cols; j++) {
-        m.data[i][j] = this.data[i][j];
+  static copy(matrix) {
+    let matrixCopy = new Matrix(matrix.rows, matrix.cols);
+    for (let i = 0; i < matrix.rows; i++) {
+      for (let j = 0; j < matrix.cols; j++) {
+        matrixCopy.data[i][j] = matrix.data[i][j];
       }
     }
-    return m;
+    return matrixCopy;
   }
 
   static fromArray(arr) {

From bc7ae6ed8aa35c36be3e4e2e983986c31f835415 Mon Sep 17 00:00:00 2001
From: Vignesh S <vignesh6993@live.in>
Date: Sun, 26 Jan 2020 12:01:09 +0530
Subject: [PATCH 2/3] Update matrix.test.js

---
 lib/matrix.test.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/matrix.test.js b/lib/matrix.test.js
index 49fc653..9b6fdee 100644
--- a/lib/matrix.test.js
+++ b/lib/matrix.test.js
@@ -381,7 +381,7 @@ test('matrix copy', () => {
   let m = new Matrix(5, 5);
   m.randomize();
 
-  let n = m.copy();
+  let n = Matrix.copy(m);
 
   expect(n).toEqual({
     rows: m.rows,

From 6bd3028761fda448a8c018087ab66056a8f08822 Mon Sep 17 00:00:00 2001
From: Vignesh S <vignesh6993@live.in>
Date: Sun, 26 Jan 2020 12:03:53 +0530
Subject: [PATCH 3/3] Reflect changes for static function in nn class

Reflect changes made in matrix lib for static function in nn class
---
 lib/nn.js | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/lib/nn.js b/lib/nn.js
index 0cb4527..2ceccb8 100644
--- a/lib/nn.js
+++ b/lib/nn.js
@@ -30,11 +30,10 @@ class NeuralNetwork {
       this.hidden_nodes = a.hidden_nodes;
       this.output_nodes = a.output_nodes;
 
-      this.weights_ih = a.weights_ih.copy();
-      this.weights_ho = a.weights_ho.copy();
-
-      this.bias_h = a.bias_h.copy();
-      this.bias_o = a.bias_o.copy();
+      this.weights_ih = Matrix.copy(a.weights_ih);
+      this.weights_ho = Matrix.copy(a.weights_ho);
+      this.bias_h = Matrix.copy(a.bias_h);
+      this.bias_o = Matrix.copy(a.bias_o);
     } else {
       this.input_nodes = in_nodes;
       this.hidden_nodes = hid_nodes;