refactor: improvemnts in _hash()

Author: ashokdey

src/_DataStructures_/HashTable/index.js

@@ -36,12 +36,14 @@ class HashTable {
     for (let i = 0; i < loopTill; i += 1) {
       const char = stringKey[i];
       const value = char.charCodeAt(0) - 96;
-      index = (index * PRIME_MULTIPLIER + value) % this.bucket.length;
+      // eslint-disable-next-line no-bitwise
+      index &= index;
+      index = index * PRIME_MULTIPLIER + value;
       if (this.strongHash) {
-        index = (index + PRIME_ADDER) % this.bucket.length;
+        index += PRIME_ADDER;
       }
     }
-    return index;
+    return Math.abs(index % this.bucket.length);
   }
 
   _resize() {