first commit

Author: username1001

README.md

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+# js-challenges
+# js-challenges

challenges/collatz/index.js

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+// --- Directions
+// Generate the Collatz sequence starting with the positive integer n.
+// Start with any positive integer. If it's even, halve it; if odd, triple it and add 1.
+//// Repeat until you reach 1.
+// Example:
+//   collatz(12) // Sequence: [12, 6, 3, 10, 5, 16, 8, 4, 2, 1]
+
+function collatz(n) {}
+
+module.exports = collatz;

challenges/collatz/test.js

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+const collatz = require('./index');
+
+describe('Collatz Conjecture Challenge', () => {
+  it('should return the correct sequence for a positive integer greater than 1', () => {
+    const testCases = [
+      { input: 12, expectedSequence: [12, 6, 3, 10, 5, 16, 8, 4, 2, 1] },
+      { input: 7, expectedSequence: [7, 22, 11, 34, 17, 52, 26, 13, 40, 20, 10, 5, 16, 8, 4, 2, 1] },
+    ];
+
+    testCases.forEach(({ input, expectedSequence }) => {
+      const result = collatz(input);
+      expect(result).toEqual(expectedSequence);
+    });
+  });
+
+  it('should return [1] for input 1', () => {
+    expect(collatz(1)).toEqual([1]);
+  });
+
+  it('should return an empty array for input 0', () => {
+    expect(collatz(0)).toEqual([]);
+  });
+
+  it('should return an empty array for no input value', () => {
+    expect(collatz(undefined)).toEqual([]);
+  });
+});

package.json

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+{
+  "name": "js-challenges",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "Matt Fay",
+  "license": "ISC"
+}