@systemrunner14485 - When you read through Tasks associated with the _.invert() method (23, 24 & 25), it states that you are swapping the key and value for each key/value pair. You are not inverting the object. So in your example:
var object = { ‘a’: 1, ‘b’: 2, ‘c’: 1 };
should output: {1: ‘a’, 2: ‘b’ 1: ‘c’}. Thats the way I approached it and it passed the test.