Added Kadane's Algorithm implementation and test cases

Author: Muskandubey184

package-lock.json

@@ -44,7 +44,7 @@
     "eslint-plugin-jest": "27.2.1",
     "eslint-plugin-jsx-a11y": "6.7.1",
     "husky": "8.0.3",
-    "jest": "29.4.1",
+    "jest": "^29.4.1",
     "pngjs": "^7.0.0"
   },
   "engines": {

package.json

@@ -0,0 +1,17 @@
+function kadaneAlgorithm(arr) {
+  let sum = 0;
+  let maxi = 0;
+
+  for (let i = 0; i < arr.length; i++) {
+    sum += arr[i];
+    maxi = Math.max(sum, maxi);
+
+    if (sum < 0) {
+      sum = 0;
+    }
+  }
+
+  return maxi;
+}
+
+module.exports = kadaneAlgorithm;

src/algorithms/kadane-algorithm.js

@@ -0,0 +1,12 @@
+const kadaneAlgorithm = require('C:/Users/Muskan/Documents/javascript-algorithms/src/algorithms/kadane-algorithm.js');
+
+describe("Kadane's Algorithm", () => {
+  it('should return the maximum subarray sum', () => {
+    const result = kadaneAlgorithm([1, -2, 3, -1, 2, 1, -5, 4]);
+    console.log(result);
+    expect(kadaneAlgorithm([1, -2, 3, -1, 2, 1, -5, 4])).toBe(5);
+    expect(kadaneAlgorithm([-2, 1, -3, 4, -1, 2, 1, -5, 4])).toBe(6);
+    expect(kadaneAlgorithm([1, 2, 3, 4, 5])).toBe(15);
+    expect(kadaneAlgorithm([-1, -2, -3, -4])).toBe(0);
+  });
+});