Restarting a ghost Docker container My blog had been running for 5 months without a hitch, until just now. It started returning error 502. I'm still not sure why it happened, and I didn't check the logs. I simply restarted the container and it worked again: # docker ps ==>
flutter Integrate Noto Serif KR into a Flutter app I wanted to try out google_fonts and use it to display beautiful text in Korean. It was harder than the doc said. I started according to the instructions at https://pub.dev/packages/google_fonts, adding the dependency to my pubspec.yaml, then
flutter Fixing `fatal: Not possible to fast-forward, aborting.` when upgrading Flutter Because of this new package I needed, I had to upgrade my Flutter. So I ran flutter upgrade as usual. This time instead of upgrading without a hitch, it told me: % flutter upgrade Upgrading Flutter from ~/flutter... From https://github.com/flutter/flutter ... fatal:
yfinance Fixing CERTIFICATE_VERIFY_FAILED when using yfinance's ticker.info I've been using the excellent yfinance project (https://github.com/ranaroussi/yfinance) to get stock prices. However today when trying to read a ticker's basic information, it failed on me with: File ".../venv/lib/python3.7/site-packages/pandas/io/html.py", line
Hosting a Flask app The Flask quickstart guide is great. However when it was time to deploy it on my DigitalOcean, I found it impossible to access. The doc says you should run to open it to external machines: flask run --host=0.0.0.0 Yet I
angulardart Chrome 81 broke my AngularDart webapp My chatting application just broke. When I press Enter to send a message, it refreshes the page and navigates to ?. Then if I try again, it'll simply throw an exception: EXCEPTION: TypeError: Instance of 'eE': type 'eE' is not a subtype of type 'minified:
Listing open ports on MacOS I used to use netstat, but this command outputs a really clean status: sudo lsof -PiTCP -sTCP:LISTEN
flutter Switching Flutter from beta back to stable It should be as simple as running: flutter channel stable flutter upgrade But after doing so, I ran into the following error when trying to run integration tests in iOS: [VERBOSE-2:shell.cc(199)] Dart Error: Can't load Kernel binary: Invalid kernel binary format
dart Fixing `Undefined name 'required' used as an annotation.` in Dart I saw the `@required` annotation in a Firebase Auth method signature, and tried to override it. However in my project it threw this error: Undefined name 'required' used as an annotation. Try defining the name or importing it from another library.dart(undefined_annotation)
Today's random error: `FLTFirebaseCorePlugin.m:6:9: fatal error: 'UserAgent.h' file not found` Today I tried to compile a Flutter app to iOS for the first time. After setting up the signing key in XCode, I ran flutter build ios and got the following error: ~/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core-0.4.4+2/darwin/
dart web Fixing `Uncaught TypeError: Instance of 'eD': type 'eD' is not a subtype of type 'minified:cV'` After updating a bunch of dependencies in my project, I tested it in dev mode with webdev serve, and it worked fine. So I compiled it with webdev build and released it, only to find out that this time, things broke: Uncaught TypeError: Instance
dart web Fixing `CastError: Instance of 'minified:aR<String, dynamic>': type 'minified:aR<String, dynamic>' is not a subtype of type 'minified:b0'` After I updated my package dependencies on a project I had not run for a long time, I tested it in debug mode using webdev serve. Things ran fine! So I proceeded to deploy it to production with webdev build. This time, upon running
dart web Fixing `Method not found: 'promiseToFuture'.` I tried to run a Dart Web project I hadn't touched for a while, and after updating my dependencies and running it, I got this: [SEVERE]build_web_compilers:ddc on package:firebase/src/app.ddc.module (cached): Error compiling dartdevc module:firebase|lib/
flutter Integrating Firebase Auth and Google Sign-in in Flutter Web I have a Flutter app that uses Firebase Auth with Google Sign-in. I use it in Android and Firebase fine. Today I wanted to run it on web as well. I set up the project to support web (see post). Then I went to
Running an existing Flutter app on Web My starting point was flutter.io. On the main page, I clicked on "web", went to https://flutter.dev/web, then to https://flutter.dev/docs/get-started/web. The requirements say that you have to be on the beta branch: flutter channel beta flutter
Fixing `Error when reading 'bin/main.dart': No such file or directory` Sometimes when I try to launch my Flutter app, Visual Studio Code throws this at me: bin/main.dart: Error: Error when reading 'bin/main.dart': No such file or directory Exited (sigint) The fix is to open ./vscode/launch.json and to remove
dart Ignoring lint warnings in Dart Sometimes the Dart compiler warns you about a potential mistake that is actually intentional: line 19 col 37: The value of the field '_delegate' isn't used. The message above is a "health tip" that pub.dev left on my package, but it doesn't
Flutter unit tests now run in random order Earlier, I ran `flutter test` and was pleased to see this: % flutter test Shuffling test order with --test-randomize-ordering-seed=0 This is great! It'll prevent developers from accidentally writing order dependent tests.
flutter Hero works great! except with text You can watch the 1 minute YouTube demo on the documentation: Hero class - widgets library - Dart APIAPI docs for the Hero class from the widgets library, for the Dart programming language.Dart APIThere's also a full page that goes in-depth about the
Running Flutter Desktop on MacOS Flutter Desktop used to be a separate experimental project, and it was moved to the flutter GitHub repository recently as it has gotten more mature. The doc says that it is easiest to run a Flutter desktop app on MacOS, but that it still
Fixing iOS distribution certificate related errors When trying to deploy my app with Fastlane to the App Store, the commands have failed citing certificate related errors such as: error: exportArchive: No profiles for 'com.company.appname' were foundError Domain=IDEProfileLocatorErrorDomain Code=1 "No profiles for 'com.company.appname' were found"
Fixing `Could not determine java version from '11.0.5'.` I was trying to run a Java application when I got this error: # ./gradlew run FAILURE: Build failed with an exception. * What went wrong: Could not determine java version from '11.0.5'. * Try: Run with --stacktrace option to get the stack trace. Run
Fixing `PlatformException (PlatformException(sign_in_failed, com.google.android.gms.common.api.ApiException: 10: , null))` when calling GoogleSignIn.signIn() I got this issue when setting an existing project on a new machine. Based on this StackOverflow post, what I needed to do was: add my machine's Android Studio debug key to the list of whitelisted keys in Firebase's Android app.download the updated
kubernetes Second try with Kubernetes Last time, I got completely lost in all the different entities managed by Kubernetes. See http://blog.wafrat.com/kubernetes-is-hard/. Each entity refers to others by labels and selectors. Let's take it slow and get it right. Labels and SelectorsLabelsYou can assign labels to
kubernetes Kubernetes is hard It's supposed to be elegant and simplify lots of things, but right now it's just making me depressed. All this time I've been managing VMs manually. But that means I have to update Linux every once in a while, on each of them. I