From this reference: If extraction fails (e.g. if a letter was entered where a digit is expected), value is left unmodified and failbit is set (until C++11) If extraction fails, zero is written to value and failbit is set. If extraction results in the value too large or too small to fit in value, std::numeric_limits::max() … Read more
The solution indicated by @(Ted Hopp) works, but needs a little correction: in the selector, the item states need an “app:” prefix, otherwise the inflater won’t recognise the namespace correctly, and will fail silently; at least this is what happens to me. Allow me to report here the whole solution, with some more details: First, … Read more
Reducer is never an appropriate place to do this because reducers should be pure and have no side effects. I would recommend just doing it in a subscriber: store.subscribe(() => { // persist your state }) Before creating the store, read those persisted parts: const persistedState = // … const store = createStore(reducer, persistedState) If … Read more
You know a winning move can only happen after X or O has made their most recent move, so you can only search row/column with optional diag that are contained in that move to limit your search space when trying to determine a winning board. Also since there are a fixed number of moves in … Read more
Well… yes, template metaprogramming lacks side effects as it is intended. I was misled by a bug in older versions of GCC and a little unclear wording in the Standard to believe that all those features were possible. However, at least the namespace-scope functionality can be achieved with little use of templates at all. Function … Read more
Since there’s a lot of misinformation in this thread, here’s how you can do it without helper libs: handleChange: function (e) { // 1. Make a shallow copy of the items let items = […this.state.items]; // 2. Make a shallow copy of the item you want to mutate let item = {…items[1]}; // 3. Replace … Read more
Update Starting from recyclerview:1.2.0-alpha02 release StateRestorationPolicy has been introduced. It could be a better approach to the given problem. This topic has been covered on android developers medium article. Also, @rubén-viguera shared more details in the answer below. https://stackoverflow.com/a/61609823/892500 Old answer If you are using LinearLayoutManager, it comes with pre-built save api linearLayoutManagerInstance.onSaveInstanceState() and restore … Read more
We can use params, new feature of the UI-Router: API Reference / ui.router.state / $stateProvider params A map which optionally configures parameters declared in the url, or defines additional non-url parameters. For each parameter being configured, add a configuration object keyed to the name of the parameter. See the part: “…or defines additional non-url parameters…” … Read more
I think this is a much simpler version. Bundle is a built-in type which implements Parcelable public class CustomView extends View { private int stuff; // stuff @Override public Parcelable onSaveInstanceState() { Bundle bundle = new Bundle(); bundle.putParcelable(“superState”, super.onSaveInstanceState()); bundle.putInt(“stuff”, this.stuff); // … save stuff return bundle; } @Override public void onRestoreInstanceState(Parcelable state) { if … Read more
I work on React. TLDR: But can you trust React to update the state in the same order as setState is called for the same component? Yes. different components? Yes. The order of updates is always respected. Whether you see an intermediate state “between” them or not depends on whether you’re inside in a batch … Read more