underskore

Underscore.js and a little more

• delta _.delta(object, reference) Returns an object with the values from object that are different from the corresponding values in reference.

  var reference = {a: 1, b: 2, c: 2},
      object = {a: 2, b: 1, c: 2};
  
  _.delta(object, reference);
  => {a: 2, b: 1}

After installing dev dependencies, you can run tests with npm test and generate coverage reports with npm run coverage.

Feel free to fork, extend and contribute. :)