From 4324d4e71bc882f60cd5addeb32a8c2c2e11ad38 Mon Sep 17 00:00:00 2001
From: syedjafer <syedjafer1997@gmail.com>
Date: Wed, 26 Oct 2022 20:05:37 +0530
Subject: [PATCH 1/2] feat: add calculate median

---
 Maths/CalculateMedian.ts           | 30 ++++++++++++++++++++++++++++++
 Maths/test/CalculateMedian.test.ts | 22 ++++++++++++++++++++++
 2 files changed, 52 insertions(+)
 create mode 100644 Maths/CalculateMedian.ts
 create mode 100644 Maths/test/CalculateMedian.test.ts

diff --git a/Maths/CalculateMedian.ts b/Maths/CalculateMedian.ts
new file mode 100644
index 00000000..e9cfd748
--- /dev/null
+++ b/Maths/CalculateMedian.ts
@@ -0,0 +1,30 @@
+import { IsEven } from "./IsEven";
+
+/**
+ * @function calculateMedian
+ * @description This script will find the meadian value of a array of numbers.
+ * @param {number[]} numbers - Array of numeric values
+ * @return {number} - median of input numbers
+ * @see [Median](https://en.wikipedia.org/wiki/Median)
+ * @example calculateMedian([1, 2, 4, 5, 8]) = 4
+ * @example calculateMedian([1, 2, 4, 5]) = 3
+ */
+
+
+export const calculateMedian = (numbers: number[]): number => {
+  if (numbers.length < 1) {
+    throw new TypeError("Invalid Input");
+  }
+
+  let sortedArray: number[] = numbers.sort((n1,n2) => n1 - n2);
+  const totalNumbers = sortedArray.length;
+
+  if (IsEven(totalNumbers)){
+    let index = (totalNumbers) / 2;
+    return (sortedArray[index - 1] + sortedArray[index]) / 2;
+  } else {
+    let index = (totalNumbers + 1) / 2;
+    return sortedArray[index - 1]; 
+  }
+
+};
diff --git a/Maths/test/CalculateMedian.test.ts b/Maths/test/CalculateMedian.test.ts
new file mode 100644
index 00000000..57c42f7e
--- /dev/null
+++ b/Maths/test/CalculateMedian.test.ts
@@ -0,0 +1,22 @@
+import { calculateMedian } from "../CalculateMedian";
+
+describe("Tests for CalculateMedian", () => {
+  it("should be a function", () => {
+    expect(typeof calculateMedian).toEqual("function");
+  });
+
+  it("should throw error for invalid input", () => {
+    expect(() => calculateMedian([])).toThrow();
+  });
+
+  it("should return the median of an array of numbers - even length", () => {
+    const medianFunction = calculateMedian([1, 2, 3, 4]);
+    expect(medianFunction).toBe(2.5);
+  });
+
+  it("should return the median of an array of numbers - odd length", () => {
+    const medianFunction = calculateMedian([1, 2, 3, 4, 6, 8, 9]);
+    expect(medianFunction).toBe(4);
+  });
+
+});

From 26dbca4ee50fff6176385d4a484a78d49202d0f4 Mon Sep 17 00:00:00 2001
From: syedjafer <syedjafer1997@gmail.com>
Date: Thu, 27 Oct 2022 08:05:39 +0530
Subject: [PATCH 2/2] Resolving comments

---
 Maths/CalculateMedian.ts | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/Maths/CalculateMedian.ts b/Maths/CalculateMedian.ts
index e9cfd748..1a350cac 100644
--- a/Maths/CalculateMedian.ts
+++ b/Maths/CalculateMedian.ts
@@ -1,9 +1,7 @@
-import { IsEven } from "./IsEven";
-
 /**
  * @function calculateMedian
  * @description This script will find the meadian value of a array of numbers.
- * @param {number[]} numbers - Array of numeric values
+ * @param {number[]} numbers - Sorted array of numeric values
  * @return {number} - median of input numbers
  * @see [Median](https://en.wikipedia.org/wiki/Median)
  * @example calculateMedian([1, 2, 4, 5, 8]) = 4
@@ -16,10 +14,9 @@ export const calculateMedian = (numbers: number[]): number => {
     throw new TypeError("Invalid Input");
   }
 
-  let sortedArray: number[] = numbers.sort((n1,n2) => n1 - n2);
-  const totalNumbers = sortedArray.length;
+  const totalNumbers = numbers.length;
 
-  if (IsEven(totalNumbers)){
+  if (totalNumbers % 2 === 0){
     let index = (totalNumbers) / 2;
     return (sortedArray[index - 1] + sortedArray[index]) / 2;
   } else {