stateful | Finite state machine for Go | BPM library
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kandi X-RAY | stateful Summary
Create easy state machines with your existing code.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of stateful
stateful Key Features
stateful Examples and Code Snippets
Lines of Code : 12License : Non-SPDX (Apache License 2.0)
Copydef _is_stateful_pfor_op(op):
if isinstance(op, WhileOp):
return op.is_stateful
if op.type == "Const":
# Const didn't have an op_def.
return False
if op.type in passthrough_stateful_ops:
return False
if op.type in force_statef public Flux statefulMutableGenerate() {
return Flux.generate(AtomicInteger::new, (state, sink) -> {
int i = state.getAndIncrement();
sink.next("2 + " + i + " = " + (2 + i));
if (i == 101)
def stateful_ops(self):
"""Returns the list of stateful ops in function definition.
Returns:
A list of (op.name, op.type) pairs.
"""
self._create_definition_if_needed()
return self._stateful_ops Community Discussions
Trending Discussions on stateful
QUESTION
The minimal reproducible code below aims to have a loading icon when a button is pressed(to simulate loading when asynchronous computation happen).
For some reason, the Consumer Provider doesn't rebuild the widget when during the callback.
My view:
...ANSWER
Answered 2021-Jun-15 at 17:51did you try to await the future? 🤔
QUESTION
ANSWER
Answered 2021-Jun-15 at 16:44String owneruerID;
dynamic uploadusertypes;
List_children;
QUESTION
I am trying to build a cinema app with flutter. The structure is as follows:
- in each city there are a bunch of cinemas
- in a cinema there are a bunch of showrooms(salle in french)
- in a showroom(salle in french) there are five display sessions or projections, these projections are of the same film.
because the projections are of the same movie (a showroom displays the same movie in different time(e.g projections) by design), when I click on any of the projections in a showroom I should have the same posture of the same film, not a different posture in each projection.
However I get a different film posture in each projection, and I don't know what is causing this.
I am using a rest api that I created with Spring, and I am certain that the problem is not from my back-end because I am using it in an angular web app and it's working perfectly.
This is a layout of my application
this is what happened when I click on two projection of the same showroom( notice that the posture changes when it shouldn't.
and here is the code of the showroom page (salles-page.dart)
...ANSWER
Answered 2021-Jun-15 at 11:53Problem related to back-end and have nothing to do with Flutter.
QUESTION
I am trying to add api response data into datatable row.
My api response is look like this
...ANSWER
Answered 2021-Jun-15 at 06:28You should use the FutureBuilder widget to update your user interface when the data is available. The code you provided attempts to build the widgets before the data is received. This causes the _historyList to still be null.
QUESTION
I am having trouble trying to iterate over a JSON array of objects from a remote URL using Flutter's FutureBuilder.
My goal is to:
- Fetch JSON data from an API
- Output the data into a 2 column gridview layout
The JSON data is an array of objects(or a List of Maps in dart), the objects have simple string data.
I know that I need to build a future to fetch the data from the API and decode the JSON, then I need to create a FutureBuilder to output the List data into my Gridview Builder. That is what I have tried to do in my code below.
...ANSWER
Answered 2021-Jun-14 at 20:57You have to pass the function like this
QUESTION
I am trying to dynamically add items to the list in Flutter so this list runs indefinitely. (I am trying to achieve this using a ListView.builder and the Future class).
The end-effect I am seeking is an endless auto-scrolling of randomly generated images along the screen at a smooth rate (kind of like a news ticker).
Is this possible? I have been reworking for ages (trying AnimatedList etc) but cant seem to make it work!
Would love any help to solve this problem or ideas.
...ANSWER
Answered 2021-Jun-14 at 21:06In the following example code, which you can also run in DartPad, a new item is added to the list every two seconds. The ScrollController is then used to scroll to the end of the list within one second.
The timer is only used to continuously add random items to the list, you could, of course, listen to a stream (or similar) instead.
QUESTION
I am trying to create a snackbar on the click of a button in flutter, but getting exception that No ScaffoldMessenger widget found. The same code seems to work properly in the Flutter sample mentioned in docs. Am I missing something here? Thanks.
Here's my main.dart file
...ANSWER
Answered 2021-Mar-27 at 16:57scaffoldMessengerKey.currentState.showSnackBar(mySnackBar); scaffoldMessengerKey.currentState.hideCurrentSnackBar(mySnackBar); scaffoldMessengerKey.currentState.removeCurrentSnackBar(mySnackBar);
QUESTION
I have a navigation menu that I made for a test application, there are some tabs that I want to hide if I am not logged into the application. After logging in, these tabs should appear. The problem is that after logging in, I go to the desired page and I don't see all the navigation menu icons. For them to appear, I need to click on one of the available icons (only 2 icons are available for authorization) and only then the navigation menu will be updated and everything will be as it should be. All 6 icons will be visible! Can someone help me with this? Here I described the problem with the code that I am using. I would be grateful for any help.
...ANSWER
Answered 2021-Jun-14 at 13:53Your page is not re built after logging in the user, that is why your nav bar is not updated. When you click on the button it refreshes and correctly displays the new elements.
Instead of using a global variable you could look into a state management package in order to make the logged-in user available throughout your app. (article for getx the simplest one out there)
If this is simply a prototype and you want some quick and dirty, I guess you could trigger a reload of your app once a user logs in by wrapping your app with a widget that exposes a rebuild method. (article)
EDIT: Example with Getx:
QUESTION
Stateless services means there is no memory of the past. Every transaction is performed as if it were being done for the very first time.
Stateful services means that there is memory of the past. Previous transactions are remembered and may affect the current transaction.
It seems stateless always win. Is there any advantage of using stateful nowdays ?
...ANSWER
Answered 2021-Jun-14 at 10:28Its apparent no system is ever 100% stateless. There is always some sort of state memory however how minimal. Now the real deal should be how much state data you need to optimize your system.
https://docs.microsoft.com/en-us/azure/service-fabric/service-fabric-reliable-services-introduction
QUESTION
I'm trying to make a profile page where user can upload their profile picture. I have done all the required method but this error pops up:
Unhandled Exception: MissingPluginException(No implementation found for method requestPermissions on channel flutter.baseflow.com/permissions/methods)
a tab should pop up when I press on the IconButton asking for permission, but in here nothing happens just the above error pops up.
This is the code I did:
...ANSWER
Answered 2021-Mar-29 at 04:44stop the running app, go to terminal > flutter clean > then build the app again
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