initial-commit

clive-cudi/count_zeros.test.ts

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+const { CountZeros: countZeros} = require("./count_zeros");
+
+describe('countZeros', () => {
+  test('returns 0 when given an empty array', () => {
+    expect(countZeros([])).toBe(0);
+  });
+
+  test('returns 0 when given an array with no zeros', () => {
+    expect(countZeros([1, 2, 3])).toBe(0);
+  });
+
+  test('returns 1 when given an array with a single zero', () => {
+    expect(countZeros([0])).toBe(1);
+  });
+
+  test('returns the correct count when given an array with multiple zeros', () => {
+    expect(countZeros([1, 0, 5, 6, 0, 2])).toBe(2);
+  });
+
+  test('returns the correct count when given an array with all zeros', () => {
+    expect(countZeros([0, 0, 0, 0, 0])).toBe(5);
+  });
+});

clive-cudi/count_zeros.ts

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+/**
+ * Write a function CountZeros(A) that takes in an array of integers A, and returns the number of 0's in that array. 
+ * For example, given [1, 0, 5, 6, 0, 2], the function/method should return 2.
+ */
+
+function CountZeros(A: number[]): number {
+    let count = 0;
+
+    for (let i = 0; i < A.length; i++) {
+        if (A[i] === 0) {
+            count++;
+        }
+    }
+
+    return count;
+}
+
+module.exports = {CountZeros};

clive-cudi/jest.config.js

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+/** @type {import('ts-jest').JestConfigWithTsJest} */
+module.exports = {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+};