_.orderBy does not accept iteratee path arrays

[samuelcolburn]

I don't know if this is intended behavior, but _.orderBy does not work with path arrays.

An example I created using the REPL in the docs:

var users = [
  { id: '4', address: { zipCode: 4, streetName: 'Beta' } },
  { id: '3', address: { zipCode: 3, streetName: 'Alpha' } },
  { id: '1', address: { zipCode: 1, streetName: 'Alpha' } },
  { id: '2', address: { zipCode: 2, streetName: 'Alpha' } },
  { id: '5', address: { zipCode: 4, streetName: 'Alpha' } },
];
 
// Sort by `address.zipCode` in ascending order
// and by `address.streetName` in descending order.

// This works
 _.orderBy(
  users,
  ['address.zipCode', 'address.streetName'],
  ['asc', 'desc']
);

// This doesn't
_.orderBy(
  users,
  [['address','zipCode'], ['address.streetName']],
  ['asc', 'desc']
);

// => objects for [
//     ['1', [1, 'Alpha']],
//     ['2', [2, 'Alpha']],
//     ['3', [3, 'Alpha']],
//     ['4', [4, 'Beta']],
//     ['5', [4, 'Alpha']]
// ]

REPL link: https://runkit.com/samuelcolburn/5d6023bcb4e038001412b42b

Expected Behavior

That a path array ['address', 'zipCode'] is treated the same as a dot-delimited path string'address.zipCode'.

Actual Behavior

'address.zipCode' works as expected. ['address', 'zipCode'] is not sorted at all.

My apologies if this is intended behavior or if all iteratees are treated this way, it was my assumption based on functions like _.get() that these two types of paths were treated equivalently.

[jdalton]

Moved to #4453.