[Python] Cannot cast array data from dtype('O') to dtype('float64') according to the rule 'safe'
Phenomenon A title error occurs when trying to fit with the least squares method in the leastsq of spicy.optimize. from scipy import...
top of page
MR
Spell out information about application development, etc.
Search
[Flutter/dart] How to convert between images and Uint8List
Overview A library called image is useful when editing images with flutter. This library uses image data in the type Uint8List when...
[Flutter/dart] 'isDocument()': is not true.
Phenomenon I get the following error when trying to save data to firestore. Unhandled Exception: 'package:cloud_firestore_platform_interf...
[Flutter/dart]The getter 'body1' isn't defined for the class 'TextTheme'
Phenomenon I got a title error after updating flutter to 2.5.1. According to the error log, the cause seems to be charts-flutter. Cause...
[Flutter/dart] Command PhaseScriptExecution failed with a nonzero exit code
Phenomenon Developing a Flutter project on Mac. After updating Flutter to 2.5.1, I get a title error in Xcode and can't build. Cause and...
[Flutter/dart] Expand the swipe response range across the screen
Overview I will explain how to swipe the entire page in your smartphone app. Method When implementing a swipe with GestureDetector, it is...
[Flutter/dart] Some tests are not run by flutter test
Overview I tried to execute the created test with flutter test at once, but there are some tests that are not executed (even if I make it...
[Flutter/dart] Documents that should be in the firestore cannot be extracted
Overview I want to get only the documents that meet the conditions from the documents saved in the firestore. I made a query using where...
[Flutter/dart] Determine if rebuilding from the parent widget or by setState ()
Overview When creating a page with StatefulWidget, I encountered a situation where I want to determine if it was rebuilt from the parent...
[Android]Nothing is displayed in RecyclerView
Phenomenon When I try to read the data in the database and display it in RecyclerView, nothing is displayed. When I set a breakpoint and...
[Android]RecyclerView shows only one item
Phenomenon I want to read data from the database and display it in a list with RecyclerView. There should be more than one registered in...
[Android]SQLiteDataBase updates are not reflected in view
Phenomenon SQLiteDataBase is read by ContentProvider and listed in RecyclerView. Even if I update the contents of the database, it is not...
bottom of page