Hi,

When using Immutable.JS, one has to convert back and forth between Immutable objects and JavaScript objects, to pass them to Fuse.

If we could use functions to specify which key to use, it would allow the use of non-array objects such as Immutable ones:

var books = Immutable.fromJS([{
  title: "Old Man's War"
  author: {
    firstName: "John",
    lastName: "Scalzi"
  }
}]);

var fuse = new Fuse(books, { keys: [item -> item.title, item -> item.getIn(["author", "firstName"])] });

Thanks