删除键

可以使用Map.delete和Map.deleteIn方法从Maps中删除键。

  1. let movie = Immutable.fromJS({
  2.     name: 'Star Wars',
  3.     episode: 7,
  4.     actors: [
  5.         { name: 'Daisy Ridley', character: 'Rey'},
  6.         { name: 'Harrison Ford', character: 'Han Solo' }
  7.     ],
  8.     mpaa: {
  9.         rating: 'PG-13',
  10.         reason: 'sci-fi action violence'
  11.     }
  12. });
  14. movie = movie.delete('mpaa');
  16. console.log(movie.toObject());
  18. /* writes
  19. { name: 'Star Wars',
  20.   episode: 7,
  21.   actors: List [ Map { "name": "Daisy Ridley", "character": "Rey" }, Map { "name": "Harrison Ford", "character": "Han Solo" } ] }
  22. */