function dropWhile(array, predicate) {
      return (array && array.length)
        ? baseWhile(array, getIteratee(predicate, 3), true)
        : [];
    }
Creates a slice of `array` excluding elements dropped from the beginning.
Elements are dropped until `predicate` returns falsey. The predicate is
invoked with three arguments: (value, index, array).

@static
@memberOf _
@since 3.0.0
@category Array
@param {Array} array The array to query.
@param {Function} [predicate=_.identity] The function invoked per iteration.
@returns {Array} Returns the slice of `array`.
@example

var users = [
  { 'user': 'barney',  'active': false },
  { 'user': 'fred',    'active': false },
  { 'user': 'pebbles', 'active': true }
];

_.dropWhile(users, function(o) { return !o.active; });
// => objects for ['pebbles']

// The `_.matches` iteratee shorthand.
_.dropWhile(users, { 'user': 'barney', 'active': false });
// => objects for ['fred', 'pebbles']

// The `_.matchesProperty` iteratee shorthand.
_.dropWhile(users, ['active', false]);
// => objects for ['pebbles']

// The `_.property` iteratee shorthand.
_.dropWhile(users, 'active');
// => objects for ['barney', 'fred', 'pebbles']