State Management Development Tutorials, Guides & Insights

In this example, the createCounter function creates a closure that keeps track of the count variable. The returned object allows you to increment, decrement, and get the current value of count without exposing the variable directly.

While closures are incredibly useful, they can also lead to some common pitfalls if not used carefully:

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import 'package:flutter/material.dart';
import 'screens/weather_screen.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Weather App',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: WeatherScreen(),
    );
  }
}

We will use the OpenWeatherMap API to fetch weather data. You’ll need to sign up and get an API key.

• Sound Typing: Dart is both statically and dynamically typed.
• Asynchronous Programming: Supports Future and Stream classes for handling async code.
• Easy to Learn: Clean and familiar syntax.

Before you start developing a Flutter app, you need to set up your development environment.

In the src directory, create a new file called Counter.js and add the following code:

   import React from 'react';
   import { useSelector, useDispatch } from 'react-redux';

   const Counter = () => {
     const count = useSelector((state) => state.count);
     const dispatch = useDispatch();

     const increment = () => {
       dispatch({ type: 'INCREMENT' });
     };

     const decrement = () => {
       dispatch({ type: 'DECREMENT' });
     };

     return (
       <div>
         <h1>Counter: {count}</h1>
         <button onClick={increment}>Increment</button>
         <button onClick={decrement}>Decrement</button>
       </div>
     );
   };

   export default Counter;