state

问题 There are various ways to maintain user state using in web development. These are the ones that I can think of right now: Query String Cookies Form Methods (Get and Post) Viewstate (ASP.NET only I guess) Session (InProc Web server) Session (Dedicated web server) Session (Database) Local Persistence (Google Gears) (thanks Steve Moyer) etc. I know that each method has its own advantages and disadvantages like cookies not being secure and QueryString having a length limit and being plain ugly to

问题 I've been learning Redux and a part I'm unclear of is, how do I make a determination between using react state vs redux store and then dispatching actions. from my reading so far it looks like I could use React state in place of Redux store and still get things done. I understand the separation of concerns with using Redux store and just having 1 container component and the rest of it as stateless component but how do I make the determination of when to use React state Vs redux store is not

问题 Newbie here so sorry if this is pretty elementary. I'm making an extension that simply has a checkbox/switch when loaded. It is to be unchecked the first time you open it but when the extension is closed and reopened, I would like it to display whether it was checked or not. The checkbox starts a timer in the background.js and unchecking it stops it. I have all this working, except to save the state of the checkbox Relevant HTML for the popup <div class="onoffswitch"> <input type="checkbox"

问题 Is it possible to call an async redux action known as a thunk on a particular route and not perform the transition until the response has succeeded or failed? Use Case We need to load data from the server and fill a form with initial values. These initial values don't exist until the data is fetched from the server. some syntax like this would be great: <Route path="/myForm" component={App} async={dispatch(loadInitialFormValues(formId))}> 回答1: To answer the original question of preventing the

问题 I'm working on implementing the UCT algorithm in Haskell, which requires a fair amount of data juggling. Without getting into too much detail, it's a simulation algorithm where, at each "step," a leaf node in the search tree is selected based on some statistical properties, a new child node is constructed at that leaf, and the stats corresponding to the new leaf and all of its ancestors are updated. Given all that juggling, I'm not really sharp enough to figure out how to make the whole

问题 I want to learn how to manage the state of a page between navigation. for example a navigate onto page1 and then i navigate to page2, but when i navigate back to page1, the UI elements must already be there with the same data as before and they must not be re-initialized or data must not be binded again by the compiler. Also what I can do to manage state of whole application such that, I terminate the app and then when i launch it next time, the same state is already there as last time. can i

问题 I've got an Android application which maintains state regarding distance traveled, time elapsed, etc. This state I can conveniently store in an object and store a reference to that object in the Bundle when Android calls onDestroy() when the user changes the screen orientation, then restore the state in onCreate(Bundle savedBundle). However, I also have some state in the Buttons and EditText objects on the screen that I want to persist through screen orientations. For example, in onStart

问题 I'm kind of lost as to how to do this: I have some chained select boxes, with one select box per view. Each choice should be saved so that a query is built up. At the end, the query should be run. But how do you share state in django? I can pass from view to template, but not template to view and not view to view. Or I'm truly not sure how to do this. Please help! 回答1: There are many ways... in the view to template... put the variables in hidden fields in the forms. So when you "submit" in

问题 I have several beans in my Spring context that have state, so I'd like to reset that state before/after unit tests. My idea was to add a method to a helper class which just goes through all beans in the Spring context, checks for methods that are annotated with @Before or @After and invoke them. How do I get a list of instantiated beans from the ApplicationContext ? Note: Solutions which simply iterate over all defined beans are useless because I have many lazy beans and some of them must not

问题 As a fairly experienced ASP.Net developer just recently starting using MVC, I find myself struggling a bit to change my mindset from a traditional "server control and event handler" way of doing things, into the more dynamic MVC way of things. I think I am slowly getting there, but sometimes the MVC "magic" throws me off. My current scenario is to create a web page that allows the user to browse a local file, upload it to the server and repeat this until he has a list of files to work with.