[6kyu][algorithms] Find The Parity Outlier solution

You are given an array (which will have a length of at least 3, but
could be very large) containing integers. The array is either entirely
comprised of odd integers or entirely comprised of even integers except
for a single integer N. Write a method that takes the array as an
argument and returns this "outlier" N.

lib/findOUtlier/findOUtlier.test.ts

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+import { describe, it, expect } from "vitest";
+import { findOUtlier } from "./findOUtlier.ts";
+
+describe("findOUtlier", () => {
+
+  it("findOUtlier should be 1 for [0, 1, 2]", () => {
+    expect(findOUtlier([0, 1, 2])).toEqual(1);
+  });
+
+  it("findOUtlier shoud return 2 for [1, 2, 3]", () => {
+    expect(findOUtlier([1, 2, 3])).toEqual(2)
+  });
+
+  it("findOUtlier shoud return 3 for [2, 6, 8, 10, 3]", () => {
+    expect(findOUtlier([2, 6, 8, 10, 3])).toEqual(3)
+  });
+
+  it("findOUtlier shoud return 3 for [0, 0, 3, 0, 0]", () => {
+    expect(findOUtlier([0, 0, 3, 0, 0])).toEqual(3)
+  });
+
+  it("findOUtlier shoud return 0 for [1, 1, 0, 1, 1]", () => {
+    expect(findOUtlier([1, 1, 0, 1, 1])).toEqual(0)
+  });
+
+});

lib/findOUtlier/findOUtlier.ts

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+// You are given an array(which will have a length of at least 3, but could be very large) containing integers.
+// The array is either entirely comprised of odd integers or entirely comprised of even integers except for a single integer 
+// N.Write a method that takes the array as an argument and returns this "outlier" N.
+//
+//
+// [2, 4, 0, 100, 4, 11, 2602, 36] -->  11 (the only odd number)
+
+// [160, 3, 1719, 19, 11, 13, -21] --> 160 (the only even number)
+//
+//
+
+
+export function findOUtlier(integers: number[]): number {
+
+  const isEvenNum = integers.filter(num => num % 2 == 0);
+  const isOddNum = integers.filter(num => num % 2 != 0);
+
+  return isEvenNum.length == 1 ? Number(isEvenNum) : Number(isOddNum);
+};

lib/findOUtlier/index.ts

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+import { findOUtlier } from "./findOUtlier";
+
+export default findOUtlier;