我有一个包含如下数据的对象数组：
const RoomsDetails = [
{
"RoomId" : "37A",
"NumberOfBeds" : "4"
},
{
"RoomId" : "38A",
"NumberOfBeds" : "5"
},
{
"RoomId" : "39A",
"NumberOfBeds" : "4"
}
]
以及包含有效房间ID的其他阵列：
const ActiveRoomsIds = ["37A", "39A"]
现在，我只想从RoomsDetails中提取其 RoomId的中存在的房间。
我需要一些有关如何通过短代码做到这一点的帮助
答案 0 :(得分：3)
为了只获取基于ActiveRoomsIds数组的活动房间，可以使用如下过滤器：
RoomsDetails.filter( f => ActiveRoomsIds.indexOf(f.RoomId) > -1);
答案 1 :(得分：1)
也许是这样的：
const results = RoomDetails
.map( (room) => room.RoomId ) // get the roomId
.filter(roomId => ActiveRoomsIds.indexOf(roomId) !== -1); //exists in array of rooms
希望有帮助
答案 2 :(得分：1)
您也可以使用Array.prototype.includes()：
NameError:
undefined local variable or method `app' for #<Devise::Mailer:0x00007fd3271928f8>
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/rack-test-1.1.0/lib/rack/test/methods.rb:30:in `build_rack_mock_session'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/rack-test-1.1.0/lib/rack/test/methods.rb:26:in `rack_mock_session'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/rack-test-1.1.0/lib/rack/test/methods.rb:41:in `build_rack_test_session'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/rack-test-1.1.0/lib/rack/test/methods.rb:37:in `rack_test_session'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/rack-test-1.1.0/lib/rack/test/methods.rb:45:in `current_session'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionview-5.1.6/lib/action_view/helpers/controller_helper.rb:18:in `assign_controller'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionview-5.1.6/lib/action_view/base.rb:211:in `initialize'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionpack-5.1.6/lib/action_dispatch/routing/url_for.rb:106:in `initialize'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionview-5.1.6/lib/action_view/rendering.rb:72:in `new'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionview-5.1.6/lib/action_view/rendering.rb:72:in `view_context'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionview-5.1.6/lib/action_view/rendering.rb:97:in `_render_template'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionview-5.1.6/lib/action_view/rendering.rb:83:in `render_to_body'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionpack-5.1.6/lib/abstract_controller/rendering.rb:24:in `render'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionmailer-5.1.6/lib/action_mailer/base.rb:945:in `block in collect_responses_from_templates'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionmailer-5.1.6/lib/action_mailer/base.rb:942:in `each'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionmailer-5.1.6/lib/action_mailer/base.rb:942:in `each'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionmailer-5.1.6/lib/action_mailer/base.rb:942:in `map'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionmailer-5.1.6/lib/action_mailer/base.rb:942:in `collect_responses_from_templates'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionmailer-5.1.6/lib/action_mailer/base.rb:927:in `collect_responses'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionmailer-5.1.6/lib/action_mailer/base.rb:830:in `mail'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/devise-4.5.0/lib/devise/mailers/helpers.rb:19:in `devise_mail'
# ./app/mailers/devise/mailer.rb:12:in `confirmation_instructions'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionpack-5.1.6/lib/abstract_controller/base.rb:186:in `process_action'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionpack-5.1.6/lib/abstract_controller/callbacks.rb:20:in `block in process_action'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activesupport-5.1.6/lib/active_support/callbacks.rb:97:in `run_callbacks'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionpack-5.1.6/lib/abstract_controller/callbacks.rb:19:in `process_action'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionpack-5.1.6/lib/abstract_controller/base.rb:124:in `process'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionmailer-5.1.6/lib/action_mailer/rescuable.rb:23:in `block in process'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionmailer-5.1.6/lib/action_mailer/rescuable.rb:15:in `handle_exceptions'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionmailer-5.1.6/lib/action_mailer/rescuable.rb:22:in `process'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionview-5.1.6/lib/action_view/rendering.rb:30:in `process'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionmailer-5.1.6/lib/action_mailer/base.rb:609:in `block in process'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activesupport-5.1.6/lib/active_support/notifications.rb:166:in `block in instrument'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activesupport-5.1.6/lib/active_support/notifications/instrumenter.rb:21:in `instrument'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activesupport-5.1.6/lib/active_support/notifications.rb:166:in `instrument'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionmailer-5.1.6/lib/action_mailer/base.rb:608:in `process'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionmailer-5.1.6/lib/action_mailer/message_delivery.rb:105:in `block in processed_mailer'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionmailer-5.1.6/lib/action_mailer/message_delivery.rb:104:in `tap'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionmailer-5.1.6/lib/action_mailer/message_delivery.rb:104:in `processed_mailer'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/actionmailer-5.1.6/lib/action_mailer/message_delivery.rb:95:in `deliver_now'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/devise-4.5.0/lib/devise/models/authenticatable.rb:200:in `send_devise_notification'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/devise-4.5.0/lib/devise/models/confirmable.rb:121:in `send_confirmation_instructions'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/devise-4.5.0/lib/devise/models/confirmable.rb:183:in `send_on_create_confirmation_instructions'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activesupport-5.1.6/lib/active_support/callbacks.rb:413:in `block in make_lambda'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activesupport-5.1.6/lib/active_support/callbacks.rb:260:in `block in conditional'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activesupport-5.1.6/lib/active_support/callbacks.rb:511:in `block in invoke_after'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activesupport-5.1.6/lib/active_support/callbacks.rb:511:in `each'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activesupport-5.1.6/lib/active_support/callbacks.rb:511:in `invoke_after'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activesupport-5.1.6/lib/active_support/callbacks.rb:132:in `run_callbacks'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activesupport-5.1.6/lib/active_support/callbacks.rb:827:in `_run_commit_callbacks'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activerecord-5.1.6/lib/active_record/transactions.rb:343:in `committed!'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activerecord-5.1.6/lib/active_record/connection_adapters/abstract/transaction.rb:86:in `commit_records'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activerecord-5.1.6/lib/active_record/connection_adapters/abstract/transaction.rb:178:in `block in commit_transaction'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activerecord-5.1.6/lib/active_record/connection_adapters/abstract/transaction.rb:168:in `commit_transaction'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activerecord-5.1.6/lib/active_record/connection_adapters/abstract/transaction.rb:207:in `block in within_new_transaction'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activerecord-5.1.6/lib/active_record/connection_adapters/abstract/transaction.rb:191:in `within_new_transaction'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activerecord-5.1.6/lib/active_record/connection_adapters/abstract/database_statements.rb:235:in `transaction'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activerecord-5.1.6/lib/active_record/transactions.rb:210:in `transaction'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activerecord-5.1.6/lib/active_record/transactions.rb:381:in `with_transaction_returning_status'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activerecord-5.1.6/lib/active_record/transactions.rb:308:in `block in save'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activerecord-5.1.6/lib/active_record/transactions.rb:323:in `rollback_active_record_state!'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activerecord-5.1.6/lib/active_record/transactions.rb:307:in `save'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activerecord-5.1.6/lib/active_record/suppressor.rb:42:in `save'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activerecord-5.1.6/lib/active_record/persistence.rb:34:in `create'
# ./spec/mailers/user_mailer_messages_spec.rb:91:in `block (2 levels) in <top (required)>'
# ./spec/mailers/user_mailer_messages_spec.rb:89:in `block in <top (required)>'
# ./spec/mailers/user_mailer_messages_spec.rb:3:in `<top (required)>'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:286:in `load'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:286:in `block in load'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:258:in `load_dependency'
# /Users/melsatar/.rvm/gems/ruby-2.4.5/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:286:in `load'
编辑：
如果只想返回对象数组中的export default connect(mapStateToProps, {
setWarning
})(WarningModal);
属性（没有const RoomsDetails = [
{
"RoomId" : "37A",
"NumberOfBeds" : "4"
},
{
"RoomId" : "38A",
"NumberOfBeds" : "5"
},
{
"RoomId" : "39A",
"NumberOfBeds" : "4"
}
]
const ActiveRoomsIds = ["37A", "39A"]
const Active = RoomsDetails.filter( room => ActiveRoomsIds.includes(room.RoomId) )
console.log(Active);），则可以这样做：
RoomId