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kandi X-RAY | manual Summary
kandi X-RAY | manual Summary
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QUESTION
This question is about two MAUI controls (Switch
and ListView
) - I'm asking about them both in the same question as I'm expecting the root cause of the problem to be the same for both controls. It's entirely possible that they're different problems that just share some common symptoms though. (CollectionView
has similar issues, but other confounding factors that make it trickier to demonstrate.)
I'm using 2-way data binding in my MAUI app: changes to the data can either come directly from the user, or from a background polling task that checks whether the canonical data has been changed elsewhere. The problem I'm facing is that changes to the view model are not visually propagated to the Switch.IsToggled
and ListView.SelectedItem
properties, even though the controls do raise events showing that they've "noticed" the property changes. Other controls (e.g. Label
and Checkbox
) are visually updated, indicating that the view model notification is working fine and the UI itself is generally healthy.
Build environment: Visual Studio 2022 17.2.0 preview 2.1
App environment: Android, either emulator "Pixel 5 - API 30" or a real Pixel 6
The sample code is all below, but the fundamental question is whether this a bug somewhere in my code (do I need to "tell" the controls to update themselves for some reason?) or possibly a bug in MAUI (in which case I should presumably report it)?
Sample codeThe sample code below can be added directly a "File new project" MAUI app (with a name of "MauiPlayground" to use the same namespaces), or it's all available from my demo code repo. Each example is independent of the other - you can try just one. (Then update App.cs
to set MainPage
to the right example.)
Both examples have a very simple situation: a control with two-way binding to a view-model, and a button that updates the view-model property (to simulate "the data has been modified elsewhere" in the real app). In both cases, the control remains unchanged visually.
Note that I've specified {Binding ..., Mode=TwoWay}
in both cases, even though that's the default for those properties, just to be super-clear that that isn't the problem.
The ViewModelBase
code is shared by both examples, and is simply a convenient way of raising INotifyPropertyChanged.PropertyChanged
without any extra dependencies:
ViewModelBase.cs:
...ANSWER
Answered 2022-Apr-09 at 18:07These both may be bugs with the currently released version of MAUI.
This bug was recently posted and there is already a fix for the Switch to address this issue.
QUESTION
I upgraded to React 18 and things compiled fine. Today it seems every single component that uses children is throwing an error. Property 'children' does not exist on type 'IPageProps'.
Before children props were automatically included in the FC
interface. Now it seems I have to manually add children: ReactNode
. What is the correct typescript type for react children?
Is this part of the React 18 update, or is something screwed up in my env?
package.json
...ANSWER
Answered 2022-Apr-07 at 20:34It looks like the children
attribute on the typescript typings were removed.
I had to manually add children to my props; There is probably a better solution to fix this, but in the interim, this works.
QUESTION
I saw a video about speed of loops in python, where it was explained that doing sum(range(N))
is much faster than manually looping through range
and adding the variables together, since the former runs in C due to built-in functions being used, while in the latter the summation is done in (slow) python. I was curious what happens when adding numpy
to the mix. As I expected np.sum(np.arange(N))
is the fastest, but sum(np.arange(N))
and np.sum(range(N))
are even slower than doing the naive for loop.
Why is this?
Here's the script I used to test, some comments about the supposed cause of slowing done where I know (taken mostly from the video) and the results I got on my machine (python 3.10.0, numpy 1.21.2):
updated script:
...ANSWER
Answered 2021-Oct-16 at 17:42From the cpython source code for sum
sum initially seems to attempt a fast path that assumes all inputs are the same type. If that fails it will just iterate:
QUESTION
I have an iOS app, since upgrading to Xcode 13, I have noticed some peculiar changes to Tab and Navigation bars. In Xcode 13, there's now this black area on the tab and nav bars and on launching the app, the tab bar is now black as well as the navigation bar. Weird enough, if the view has a scroll or tableview, if I scroll up, the bottom tab bar regains its white color and if I scroll down, the navigation bar regains its white color.
N:B: I already forced light theme from iOS 13 and above:
...ANSWER
Answered 2021-Sep-22 at 12:40first of all the problem is cause by unchecking translucent I fixed it by choosing navigation bar appearance from attributes inspector scroll edge it will fix it see this screen shot please
QUESTION
Dart SDK officially supports ARM64 and as of now, 2.14.2 is the latest (stable) Dart SDK that has support for ARM64. Though it was the same version that was bundled in my Flutter setup, it seemed to run on Intel architecture (Activity monitor shows dart processes running on Intel).
I manually tried replacing the dart SDK on my flutter installation bu replacing flutter-directory/bin/cache/dart-sdk/
with the contents of a zip file of the Dart SDK made for ARM64, downloaded from dart.dev archive. But trying to run an app on an Android emulator (which runs on ARM64 and was working on my old Flutter setup), throws this error:
ANSWER
Answered 2021-Sep-29 at 17:46It seems it can't be used with Flutter yet, as seen in:
Apple Silicon support in the Dart SDK
[...] Note that the Dart SDK bundled in the Flutter SDK doesn’t have these improvements yet.
https://medium.com/dartlang/announcing-dart-2-14-b48b9bb2fb67
[Announcing Dart 2.14][ScreenShot]: https://i.stack.imgur.com/N8Qcc.png
And:
Get the Dart SDK
[...] As of Flutter 1.21, the Flutter SDK includes the full Dart SDK. So if you have Flutter installed, you might not need to explicitly download the Dart SDK. Consider downloading the Dart SDK if any of the following are true:
- You don’t use Flutter.
- You use a pre-1.21 version of Flutter.
- You want to reduce disk space requirements or download time, and your use case doesn’t require Flutter. For example, you might have a continuous integration (CI) setup that requires Dart but not Flutter.
[Get the Dart SDK][ScreenShot]: https://i.stack.imgur.com/rawJV.png
QUESTION
I've deployed hundreds of function and this is the first time I encounter this issue. Simply, it stops deploying function process, saying:
Unhandled error cleaning up build images. This could result in a small monthly bill if not corrected. You can attempt to delete these images by redeploying or you can delete them manually at https://console.cloud.google.com/gcr/images/[project-name]/us/gcf
The way I deploy is through Firebase CLI command: firebase deploy --only functions:nameOfFunction
Question is what are those images I have to delete? Why? How can I solve it?
...ANSWER
Answered 2021-Aug-01 at 15:56Cloud Functions uses another product called Cloud Build to build the server images that actually get deployed. Those images are stored in Cloud Storage, and that storage is billed to your account.
Read more about it:
- https://github.com/firebase/firebase-tools/issues/3404
- https://krasimirtsonev.com/blog/article/firebase-gcp-saving-money
Watch:
You should be able to locate and delete the files manually in the Google Cloud console. But it sounds like there is a bug here with the files not being cleaned up automatically, so you contact Firebase support directly.
QUESTION
I recently wrote
...ANSWER
Answered 2022-Jan-24 at 21:54You could perhaps do it like this:
QUESTION
After updating my npm packages, some of the imports from the 'vue' module started showing errors:
TS2305: Module '"../../node_modules/vue/dist/vue"' has no exported member 'X'
where X is nextTick, onMounted, ref, watch etc. When serving the project, Vue says it's "failed to compile". WebStorm actually recognizes the exports, suggests them and shows types, but the error is shown regardless. Some exports like computed and defineComponent work just fine.
What I've tried:
- Rollback to the previously used Vue version "3.2.2" > "3.0.11". It makes the abovementioned type errors disappear, but the app stops working entirely, showing lots of
TypeError: Object(...) is not a function
errors in console and not rendering the app at all. In the terminal, some new warnings are introduced:"export 'X' (imported as '_X') was not found in 'vue'
where X is createElementBlock, createElementVNode, normalizeClass and normalizeStyle. - Rollback other dependencies. None of the ones that I tried helped fix the problem, unfortunately.
- Manually declare the entirety of 'vue' module. We can declare the 'vue' module exports in shims-vue.d.ts, and it actually makes the errors disappear, however, this seems like a terrible, time-consuming workaround, so I would opt out for a better solution if possible.
My full list of dependencies:
...ANSWER
Answered 2021-Aug-15 at 13:53That named exports from composition API are unavailable means that vue
is Vue 2 at some place which has only default export. Since Vue 3 is in dependencies
and both lock file and node_modules
were refreshed, this means that Vue 2 is nested dependency of some direct dependency.
The problem needs to be investigated in lock file. It shows that @vue/cli-plugin-unit-jest@4.5.13
depends on vue-jest@3
which depends on vue@2
.
A possible solution is to upgrade @vue/cli-plugin-unit-jest
to the latest version, next
. The same likely applies to other @vue/cli-*
packages because they have matching versions.
QUESTION
I'm having trouble understanding how/why parentheses work where they otherwise should not work®.
...ANSWER
Answered 2022-Jan-09 at 16:14Note: When referring to documentation and source code, I provide links to an unofficial GitHub mirror of R's official Subversion repository. The links are bound to commit 97b6424 in the GitHub repo, which maps to revision 81461
in the Subversion repo (the latest at the time of this edit).
substitute
is a "special" whose arguments are not evaluated (doc).
QUESTION
I have an app that has been running for years with no changes to the code. The app has OAuth2.0 login with a variety of providers including Google Workspace and Office 365. Since the launch of Chrome V97 (i.e. in last few days), the O365 login has stopped working, as for some reason, the auth cookie does not get set in the OAuth callback GET handler. The code that sets the cookie is the same code that is run for Google Workspace, yet this works. It also works on Firefox. Something about Google Chrome V97 is preventing cookies from being set, but only if it round trips to O365 first.
To isolate the issue, I have created a fake callback which manually sets a cookie, thereby removing all of the auth complication. If I call this by visiting the URL in a browser, then the cookie sets as expected. Yet if I perform the O365 OAuth dance first, which in turn invokes this URL, then the cookie does not get set. Try exactly the same thing with Google Workspace and it works.
I have been debugging this for hours and hours and clean out of ideas.
Can anyone shed any light on what could be causing this odd behaviour?
...ANSWER
Answered 2022-Jan-10 at 19:43We ran into this too, fixed by adding SameSite=none;
to the auth cookie. In Chrome 97 SameSite
is set to Lax
if missing. See more here https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Set-Cookie/SameSite
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