i have fixed issues following the feedback instructions

Author: KKtech06

Sprint-1/fix/median.js

@@ -10,7 +10,7 @@ function calculateMedian(list) {
     return null;
   }
   const numbersOnly = list.filter(item => typeof item === 'number');
-  const sorted = [...numbersOnly].sort((a, b) => a - b);
+  const sorted = numbersOnly.sort((a, b) => a - b);
 
   if (sorted.length === 0) {
     return null;

Sprint-1/fix/median.test.js

@@ -13,7 +13,8 @@ describe("calculateMedian", () => {
     { input: [1, 2, 3, 4], expected: 2.5 },
     { input: [1, 2, 3, 4, 5, 6], expected: 3.5 },
   ].forEach(({ input, expected }) =>
-    it(`returns the median for [${input}]`, () => expect(calculateMedian(input)).toEqual(expected))
+    it(`returns the median for [${input}]`, () =>
+      expect(calculateMedian(input)).toEqual(expected))
   );
 
   [
@@ -22,9 +23,10 @@ describe("calculateMedian", () => {
     { input: [4, 2, 1, 3], expected: 2.5 },
     { input: [6, 1, 5, 3, 2, 4], expected: 3.5 },
     { input: [110, 20, 0], expected: 20 },
-    { input: [6, -2, 2, 12, 14], expected: 6},
+    { input: [6, -2, 2, 12, 14], expected: 6 },
   ].forEach(({ input, expected }) =>
-    it(`returns the correct median for unsorted array [${input}]`, () => expect(calculateMedian(input)).toEqual(expected))
+    it(`returns the correct median for unsorted array [${input}]`, () =>
+      expect(calculateMedian(input)).toEqual(expected))
   );
 
   it("doesn't modify the input array [3, 1, 2]", () => {
@@ -33,8 +35,17 @@ describe("calculateMedian", () => {
     expect(list).toEqual([3, 1, 2]);
   });
 
-  [ 'not an array', 123, null, undefined, {}, [], ["apple", null, undefined] ].forEach(val =>
-    it(`returns null for non-numeric array (${val})`, () => expect(calculateMedian(val)).toBe(null))
+  [
+    "not an array",
+    123,
+    null,
+    undefined,
+    {},
+    [],
+    ["apple", null, undefined],
+  ].forEach((val) =>
+    it(`returns null for non-numeric array (${val})`, () =>
+      expect(calculateMedian(val)).toBe(null))
   );
 
   [
@@ -45,6 +56,7 @@ describe("calculateMedian", () => {
     { input: [3, "apple", 1, null, 2, undefined, 4], expected: 2.5 },
     { input: ["banana", 5, 3, "apple", 1, 4, 2], expected: 3 },
   ].forEach(({ input, expected }) =>
-    it(`filters out non-numeric values and calculates the median for [${input}]`, () => expect(calculateMedian(input)).toEqual(expected))
+    it(`filters out non-numeric values and calculates the median for [${input}]`, () =>
+      expect(calculateMedian(input)).toEqual(expected))
   );
 });

Sprint-1/implement/dedupe.test.js

@@ -25,3 +25,4 @@ test.todo("given an empty array, it returns an empty array");
 // Given an array with strings or numbers
 // When passed to the dedupe function
 // Then it should remove the duplicate values, preserving the first occurence of each element
+

Sprint-1/implement/max.test.js

@@ -41,3 +41,4 @@ test.todo("given an empty array, returns -Infinity");
 // Given an array with only non-number values
 // When passed to the max function
 // Then it should return the least surprising value given how it behaves for all other inputs
+

Sprint-1/implement/sum.js

@@ -1,14 +1,11 @@
-function sum(elements)
-{    let sum = 0;
-    for (let i = 0; i < elements.length; i++) {
-        if (typeof elements[i] === "number"){
-            sum += elements[i];
-        }
+function sum(elements) {
+  let sum = 0;
+  for (let i = 0; i < elements.length; i++) {
+    if (Number.isFinite(elements[i])) {
+      sum += elements[i];
     }
-    
-    return sum;
+  }
+  return sum;
 }
 
-
-
 module.exports = sum;

Sprint-1/implement/sum.test.js

@@ -34,3 +34,4 @@ test.todo("given an empty array, returns 0")
 // Given an array with only non-number values
 // When passed to the sum function
 // Then it should return the least surprising value given how it behaves for all other inputs
+

Sprint-1/refactor/includes.js

@@ -1,11 +1,11 @@
 // Refactor the implementation of includes to use a for...of loop
 
 function includes(list, target) {
-    for (const element of list) {
-        if (element === target) {
-            return true;
-        }
+  for (const element of list) {
+    if (element === target) {
+      return true;
     }
+  }
   return false;
 }