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fs.js:134
  throw new ERR_INVALID_CALLBACK();
  ^

TypeError [ERR_INVALID_CALLBACK]: Callback must be a function
    at maybeCallback (fs.js:134:9)
    at Object.writeFile (fs.js:1180:14)
    at /usr/local/lib/node_modules/codewars-client/index.js:76:8
    at /usr/local/lib/node_modules/codewars-client/node_modules/mkdirp/index.js:48:26
    at FSReqCallback.oncomplete (fs.js:160:5)

{
  "_data": {
    "success": true,
    "name": "Square(n) Sum",
    "slug": "square-n-sum",
    "description": "Complete the `squareSum`/`square_sum`/`SquareSum` method so that it squares each number passed into it and then sums the results together.\n\nFor example:\n```javascript\nsquareSum([1, 2, 2]); // should return 9\n```\n```coffeescript\nsquareSum([1, 2, 2]) # should return 9\n```\n```python\nsquare_sum([1, 2, 2]) # should return 9\n```\n```ruby\nsquareSum([1, 2, 2]) # should return 9\n```\n```crystal\nsquareSum([1, 2, 2]) # should return 9\n```\n```haskell\nsquareSum [1, 2, 2] -- should return 9\n```\n```dart\nsquareSum([1, 2, 2]); // should return 9\n```\n```rust\nsquare_sum([1, 2, 2]) // should return 9\n```\n```cpp\nsquare_sum({1, 2, 2}); // should return 9\n```\n```csharp\nKata.SquareSum(new int[] {1, 2, 2}) # should return 9\n```\n```c\nconst int values[] = { 1, 2, 2 };\nconst size_t count = sizeof(values)/sizeof(values[0]);\n\nsquare_sum(values, count); // should return 9\n```\n",
    "author": null,
    "rank": -8,
    "averageCompletion": 39604.54756929734,
    "tags": [
      "Fundamentals",
      "Arithmetic",
      "Mathematics",
      "Algorithms",
      "Logic",
      "Numbers",
      "Arrays",
      "Data Types",
      "Lists",
      "Data Structures"
    ],
    "session": {
      "projectId": "5b6d9b0d68cb2eef1b0000e4",
      "solutionId": "5b6d9b0eb3d9774eaf000002",
      "setup": "function squareSum(numbers){\n\n}",
      "exampleFixture": "Test.assertEquals(squareSum([1,2]), 5)\nTest.assertEquals(squareSum([0, 3, 4, 5]), 50)",
      "code": null,
      "recentlyAttempted": null
    }
  },
  "name": "Square(n) Sum",
  "description": "Complete the `squareSum`/`square_sum`/`SquareSum` method so that it squares each number passed into it and then sums the results together.\n\nFor example:\n```javascript\nsquareSum([1, 2, 2]); // should return 9\n```\n```coffeescript\nsquareSum([1, 2, 2]) # should return 9\n```\n```python\nsquare_sum([1, 2, 2]) # should return 9\n```\n```ruby\nsquareSum([1, 2, 2]) # should return 9\n```\n```crystal\nsquareSum([1, 2, 2]) # should return 9\n```\n```haskell\nsquareSum [1, 2, 2] -- should return 9\n```\n```dart\nsquareSum([1, 2, 2]); // should return 9\n```\n```rust\nsquare_sum([1, 2, 2]) // should return 9\n```\n```cpp\nsquare_sum({1, 2, 2}); // should return 9\n```\n```csharp\nKata.SquareSum(new int[] {1, 2, 2}) # should return 9\n```\n```c\nconst int values[] = { 1, 2, 2 };\nconst size_t count = sizeof(values)/sizeof(values[0]);\n\nsquare_sum(values, count); // should return 9\n```\n",
  "slug": "square-n-sum",
  "setup": "function squareSum(numbers){\n\n}",
  "tests": "Test.assertEquals(squareSum([1,2]), 5)\nTest.assertEquals(squareSum([0, 3, 4, 5]), 50)",
  "solutionId": "5b6d9b0eb3d9774eaf000002",
  "projectId": "5b6d9b0d68cb2eef1b0000e4",
  "rank": "8"
}

function squareSum(numbers){
	return numbers.reduce(function(sum, number){
		return sum + (number*number)
	}, 0);
}

$ codewars verify index.js

Nope. Your solution is incorrect. :(

## Stack trace

undefined

## Tests

(node:90314) MaxListenersExceededWarning: Possible EventEmitter memory leak detected.  11 exit listeners added.  Use emitter.setMaxListeners() to increase limit

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