Object Key Zipping?

I didn't find any other requests similar to this, so forgive me if there has been one already.

Underscore supplies a method called zip, which is great. What I'm wanting is the ability to zip objects by their keys.

var before = {
  key1: ['val1', 'val2', 'val3'],
  key2: ['val4', 'val5', 'val6'],
  key3: ['val7', 'val8', 'val9']
};

var after = [
  {  key1: "val1",  key2: "val4",  key3: "val7"  },
  {  key1: "val2",  key2: "val5",  key3: "val8"  },
  {  key1: "val3",  key2: "val6",  key3: "val9"  }
]

I have something working for this, is there any interest in adding functionality like this to the repo? I can submit a PR if needed, just wanted to gauge interest before I start adding tests and getting my code styled correctly.

My first pass at implementation:

var zipObj = function( obj ) {
  var keys = Object.keys(obj);
  return _.zip.apply(_, keys.map(function(k, i) { return obj[k] || '' }))
  .map(function(d) { 
    var obj = {};

    keys.forEach(function(k, i) { obj[k] = d[i] });
    return obj;
  });
}

Start with the existing zip entry point and compare its behavior with the before and after examples. Review the proposed zipObj behavior, add coverage for object keys and value arrays, and consider missing-value handling; done means the input object produces the demonstrated array of keyed objects.