From 04cc718fe54e8dde83656688b427fa2a0831464f Mon Sep 17 00:00:00 2001
From: Samori Gorse <samori@codeinstyle.io>
Date: Fri, 3 Jan 2025 22:43:37 +0100
Subject: [PATCH] feat: Refactoring

---
 lib/decimal.js | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/lib/decimal.js b/lib/decimal.js
index 08beaa1..cdb4c25 100755
--- a/lib/decimal.js
+++ b/lib/decimal.js
@@ -49,19 +49,23 @@ var Decimal = function (num) {
 
   // Helper to normalize zero values
   this.normalizeZero = function () {
-    if (
-      this.internal === '0' ||
-      this.internal === '-0' ||
-      this.internal === '00' ||
-      this.internal === '000'
-    ) {
+    if (this.internal === '-0') {
       return '0';
     }
+
+    if (this.internal.split('').every((char) => char === '0')) {
+      return '0';
+    }
+
     return this.internal;
   };
 
+  this.zeroOperands = function (a, b) {
+    return (a === '0' || a === '-0') && (b === '0' || b === '-0');
+  };
+
   this.add = function (target) {
-    if ((this.internal === '0' || this.internal === '-0') && (target === '0' || target === '-0')) {
+    if (this.zeroOperands(this.internal, target)) {
       return Decimal('0');
     }
 
@@ -82,14 +86,14 @@ var Decimal = function (num) {
   };
 
   this.sub = function (target) {
-    if ((this.internal === '0' || this.internal === '-0') && (target === '0' || target === '-0')) {
+    if (this.zeroOperands(this.internal, target)) {
       return Decimal('0');
     }
     return Decimal(this.add(target * -1));
   };
 
   this.mul = function (target) {
-    if ((this.internal === '0' || this.internal === '-0') && (target === '0' || target === '-0')) {
+    if (this.zeroOperands(this.internal, target)) {
       return Decimal('0');
     }