i have fixed little issues

Author: KKtech06

Sprint-1/fix/median.js

@@ -9,7 +9,7 @@ function calculateMedian(list) {
   if (!Array.isArray(list)) {
     return null;
   }
-  const numbersOnly = list.filter(item => typeof item === 'number');
+  const numbersOnly = list.filter((item) => Number.isFinite(item));
   const sorted = numbersOnly.sort((a, b) => a - b);
 
   if (sorted.length === 0) {

Sprint-1/implement/max.js

@@ -1,12 +1,22 @@
-function findMax(elements){
-    let max = -Infinity;
-   for (let i = 0; i < elements.length; i++) {
-     if (typeof elements[i] === "number")
-       if (elements[i] > max) {
-         max = elements[i];
-       }
-   }
-    return max;
+function findMax(elements) {
+  let max = -Infinity;
+  let foundNumber = false;
+
+  for (let i = 0; i < elements.length; i++) {
+    if (Number.isFinite(elements[i])) {
+      foundNumber = true;
+
+      if (elements[i] > max) {
+        max = elements[i];
+      }
+    }
+  }
+
+  if (!foundNumber) {
+    return null;
+  }
+
+  return max;
 }
 
-module.exports = findMax;
+module.exports = findMax;