Hasindu's Diary

 Implement a real-time, interactive map showing bin locations and status, with color coding to indicate levels (e.g., green for low, red for high). 1. Set Up the Frontend Map Choose a Mapping Library : Use a library like Leaflet.js (open-source and lightweight) or Google Maps API (feature-rich but has usage limits). For example, Leaflet can be integrated with a CDN or npm: < link rel = "stylesheet" href = "https://unpkg.com/leaflet/dist/leaflet.css" /> < script src = "https://unpkg.com/leaflet/dist/leaflet.js" > </ script > https://leafletjs.com/examples/quick-start/ Initialize the Map : Set up a base map centered on the target area (e.g., a city). const map = L. map ( 'map' ). setView ([latitude, longitude], zoomLevel); L. tileLayer ( 'https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png' , { maxZoom : 19 , }). addTo (map); 2. Backend: Store and Retrieve Bin Data Bin Database : Each bin entry should store at least

 In React, the setState function is essential for updating the component state. Here are various usage patterns for setState , primarily focusing on functional components with hooks (like useState ), but also touching on class components. 1. Basic State Update In a functional component, you can use setState to update a simple piece of state: const [count, setCount] = useState ( 0 ); const increment = ( ) => { setCount (count + 1 ); }; 2. Functional Update When the new state depends on the previous state, use a functional update: const increment = ( ) => { setCount ( prevCount => prevCount + 1 ); }; 3. Updating Multiple State Variables If you have multiple pieces of state, you can update them separately: const [count, setCount] = useState ( 0 ); const [name, setName] = useState ( "" ); const updateCount = ( ) => { setCount (count + 1 ); }; const updateName = ( newName ) => { setName (newName); }; 4. Using an Object to Manage Sta