Add '*' setting for keys, to search all keys.

It’d be cool if the keys setting could be set to '*' to search all keys.

Example:

var options = {
  shouldSort: true,
  threshold: 0.6,
  location: 0,
  distance: 100,
  maxPatternLength: 32,
  keys: '*'
};
var fuse = new Fuse(list, options); // "list" is the item array
var result = fuse.search("red");

Result:

[
  {
    "title": "Backwards, Red Dwarf",
    "author": {
      "firstName": "Rob",
      "lastName": "Grant"
    }
  },
  {
    "title": "HTML5",
    "author": {
      "firstName": "Remy",
      "lastName": "Sharp"
    }
  },
  {
    "title": "The Book of Lies",
    "author": {
      "firstName": "Brad",
      "lastName": "Meltzer"
    }
  },
  {
    "title": "Lamb",
    "author": {
      "firstName": "Christopher",
      "lastName": "Moore"
    }
  },
  {
    "title": "Fool",
    "author": {
      "firstName": "Christopher",
      "lastName": "Moore"
    }
  },
  {
    "title": "The Preservationist",
    "author": {
      "firstName": "David",
      "lastName": "Maine"
    }
  }
]

[fimius23]

I vote for the logic where “If the key option is empty, then search all keys”. I think it’s really on the developer using the logic to worry about the max depth. They can always write code to map() their array to something sane before they run the fuzzy search.

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