reactive-programming

问题 I'm getting an error when I try to bind values to the component function handleInput: Uncaught TypeError: Cannot read property 'bind' of undefined However, when I insert the input element into the return statement at the bottom of the render method, it doesn't produce any errors. I'm guessing that this has something to do with the lifecycle of the render method, but I'm not sure. Any insight is appreciated. As for what the code does, it retrieves a string from this.props.info.text and

问题 I have developed an android mobile app using react-native. My native language for the app is English but I want to make it available in Mandarin Chinese also. So my question is how can I convert my static and fetched data into Mandarin Chinese. please share a solution. 回答1: Yes, you can do it. For changing the Application language to multi-language app,i.e., also include Mandarin Chinese. For Static contents/text Use the package react-native-i18n Link : https://www.npmjs.com/package/react

问题 The following code emits items from observable1 only after observable2 is completed. observable1.startWith(observable2) .subscribe() I need to achieve another behavior observable1 -> 0 1 2 3 observable2 -> 1 2 3 4 5 6 observable1.startWithDefault(observable2) -> 1 2 0 1 2 3 The second observable emits items only while first observable is empty and then items from first one are emited. I could not find correct solution using only basic operators, what is correct RxJava 2 implementation of

问题 As definied combineLatest in rx emites only if all values have changed at least once. (so long as each of the source Observables has emitted at least one item) I use it to manipulate views within my android views. For example, I enable a call to action button as soon as all observables emitted a valid value. Otherwise I disable it. Observable.combineLatest( toObservable(email), toObservable(username), toObservable(status), toObservable(phonenumber), toObservable(birthdate), Function5<String,

问题 As definied combineLatest in rx emites only if all values have changed at least once. (so long as each of the source Observables has emitted at least one item) I use it to manipulate views within my android views. For example, I enable a call to action button as soon as all observables emitted a valid value. Otherwise I disable it. Observable.combineLatest( toObservable(email), toObservable(username), toObservable(status), toObservable(phonenumber), toObservable(birthdate), Function5<String,

问题 I am trying to implement bloc pattern in rxdart . I am trying to build todo app type of app . I implemented showing all items in list but what I want is not to show completed and uncompleted items in different part . However I am not able to filter the items based on completed on rxdart . import 'package:rxdart/rxdart.dart'; import '../models/ShoppingItem.dart'; class ShoppingItemBloc { final _shoppingItems = BehaviorSubject<List<ShoppingItem>> (seedValue: []); Observable<List<ShoppingItem>>

问题 I am trying to implement bloc pattern in rxdart . I am trying to build todo app type of app . I implemented showing all items in list but what I want is not to show completed and uncompleted items in different part . However I am not able to filter the items based on completed on rxdart . import 'package:rxdart/rxdart.dart'; import '../models/ShoppingItem.dart'; class ShoppingItemBloc { final _shoppingItems = BehaviorSubject<List<ShoppingItem>> (seedValue: []); Observable<List<ShoppingItem>>

问题 According to akka streams docs one can handle stream failure by defining a decider that maps a Throwable to a Strategy : val decider: Supervision.Decider = { case _: ArithmeticException => Supervision.Resume case _ => Supervision.Stop } I wonder if there is a way to also get access to the element that caused the error. Of course, the type of this element is unknown, but is there a way to get it even as an instance of Object ? 回答1: The trivial way would be to catch the ArithmeticException near

问题 According to akka streams docs one can handle stream failure by defining a decider that maps a Throwable to a Strategy : val decider: Supervision.Decider = { case _: ArithmeticException => Supervision.Resume case _ => Supervision.Stop } I wonder if there is a way to also get access to the element that caused the error. Of course, the type of this element is unknown, but is there a way to get it even as an instance of Object ? 回答1: The trivial way would be to catch the ArithmeticException near

问题 i have a angular component, that uses 3 services. Each of those services has an observer, that i can subscribe to. The view of the component must be updated, if anything on the observed changes, that happens through websockets (feathers.js). I want the doSomethingWithTheNewDataThatIsShownOnView() to be called only once on ngInit and i think, i can do this with forkJoin: private ngOnInit(): void { Observable.forkJoin( this.filesService.inputs$, this.filesService.outputs$, this.processesService