simplify number card check with updated regex

Author: HoussamLh

Sprint-3/2-mandatory-rewrite/3-get-card-value.js

@@ -1,18 +1,14 @@
 function getCardValue(card) {
-  const rank = card.slice(0, -1); // remove suit (last char)
+  const rank = card.slice(0, -1); // remove suit
 
   if (!rank) throw new Error("Invalid card rank");
 
   if (rank === "A") return 11;
   if (["K", "Q", "J"].includes(rank)) return 10;
-  if (rank === "10") return 10;
-
-  // Explicit check for number cards (2–9 only, no leading zeros or decimals)
-  if (/^[2-9]$/.test(rank)) {
-    return Number(rank);
-  }
+  if (/^(?:[2-9]|10)$/.test(rank)) return Number(rank);
 
   throw new Error("Invalid card rank");
 }
 
 module.exports = getCardValue;
+