Does MongoDB's $in clause guarantee order

Question

When using MongoDB\'s $in clause, does the order of the returned documents always correspond to the order of the array argument?

Answer 1

I know this is an old thread, but if you're just returning the value of the Id in the array, you may have to opt for this syntax. As I could not seem to get indexOf value to match with a mongo ObjectId format.

  obj.map = function() {
    for(var i = 0; i < inputs.length; i++){
      if(this._id.equals(inputs[i])) {
        var order = i;
      }
    }
    emit(order, {doc: this});
  };

How to convert mongo ObjectId .toString without including 'ObjectId()' wrapper -- just the Value?