I have made an to do list with firebase. but when i click to create a new to do, i can’t see anything apear on my page but in firebase it does show the string. How can i fix this (this is in flutter) logcat: 2022-10-19 15:24:50.758 23369-23584 flutter com.example.voorbeeld I apen created import ‘package:flutter/material.dart’;… Read More how can i fix this error of my todo list? SOLVED
I’m trying to make a function to delete the "clicked" task but I can’t figure out what is the problem. I created an array with useState where I save all tasks. When task is created is asigned to a key ( i ). When delete button is clicked, trigger deleteTask function with ( i )… Read More Simple To-Do List with React, Array.filter is not working as expected?
estoy tratando de descifrar como armar esta base datos, tengo la siguiente informació pero tengo dudas de donde colocar las claves foraneas ya que el esquema no está tan claro, agradeceria si me pudiesen dar una mano. Sobre todo en la relacion "one or many to one or many" con pregunta y etiqueta, un saludo.… Read More Duda base de datos MySql
I want my tab layout to appear on top of my screen. Currently it is on the bottom on the screen. Tried a few ways didn’t work. How can I make it go on top of my screen. Code for the xml file <?xml version="1.0" encoding="utf-8"?> <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".kanbanManagement"> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto"… Read More send tab layout on top
import ‘package:firebase_auth/firebase_auth.dart’; import ‘package:flutter/material.dart’; import ‘package:ourchat/screens/home/chat_screen.dart’; import ‘package:ourchat/screens/welcome/welcome_screen.dart’; class LandingPage extends StatefulWidget{ @override State<LandingPage> createState() => _LandingPageState(); } class _LandingPageState extends State<LandingPage>{ late User _user; @override void initState(){ // TODO: implement initState super.initState(); _checkUser(); } @override Widget build(BuildContext context) { if(_user == null){ return WelcomeScreen(); }else{ return HomePage(); } } Future<void> _checkUser() async{ _user =… Read More error: The function can't be unconditionally invoked because it can be 'null'. with flutter
I have a dataframe that looks like this import pandas as pd all_data_set = [ (‘A’,’Area1′,’AA’,’A B D E’,’A B’,’D E’), (‘B’,’Area1′,’AA’,’A B D E’,’A B’,’D E’), (‘C’,’Area2′,’BB’,’C’,’C’,’C’), (‘E’,’Area1′,’CC’,’A B D E’,’A B’,’D E’), (‘F’,’Area3′,’BB’,’F G’,’G’,’F’) ] all_df = pd.DataFrame(data = all_data_set, columns = [‘Name’,’Area’,’Type’,’Group’,’AA members’,’CC members’]) Name Area Type Group AA members CC members… Read More Pandas find and replace based on column items count
Consider this test collection, in which an airport is identified by AirportID: { AirportID:"1001", delayMinutes :"15.0" }, { AirportID:"1004", delayMinutes :"3.0" }, { AirportID:"1001", delayMinutes :"20.0" }, { AirportID:"1002", delayMinutes :"6.0" }, { AirportID:"1002", delayMinutes :"25.0" }, { AirportID:"1004", delayMinutes :"55.0" }, I want to group it together and list the top 2 from that… Read More MongoDB – Group and Find Top N with condition
The ASP.NET Core minimal API docs show syntax similar to the following: db.Todos.Find(id) is Todo todo ? Results.Ok(todo) : Results.NotFound()); I believe this is a use case of the ? operator which is documented in the main C# docs. However, these docs only show the following format: condition ? consequent : alternative in which condition… Read More ASP.NET Core docs show unfamiliar usage of the ? operator. What does it mean?
I want to create an object user for a website project that I am using. I have made the blueprint of the class in a saperate file called calsses.php and it contains the following code: <?php class User { private $username; private $email; private $address; private $password; private $telephone; public function __construct($username, $email, $address, $password,… Read More I can't create a user object in php
public class MythreadM { public static void main(String[] args) { // TODO Auto-generated method stub Msg m = new Msg(); Mythread thread1 = new Mythread(m); thread1.start(); Mythread thread2 = new Mythread(m); thread2.start(); Mythread thread3 = new Mythread(m); thread3.start(); } } class Mythread extends Thread { private Msg m; Mythread(Msg m) { this.m = m; }… Read More Thread synchronizing – almost same expressions but different result