React Js Separate array of timestamps into days
React Js Separate array of timestamps into days:To separate an array of timestamps into days using React.js, you can follow these steps. First, iterate through the array of timestamps. For each timestamp, convert it into a JavaScript Date object. Then, retrieve the day, month, and year from the Date object. Create a new object for each unique date, with the day, month, year, and an empty array for notes.
Check if an object already exists for the date, and if it does, add the note to its array. If not, create a new object with the date and add the note. Finally, you will have an array of objects, each representing a unique date with its corresponding notes.
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How can I separate an array of timestamps into individual days using Reactjs?
The given React.js code separates an array of timestamps into days. It uses the testData array, which contains objects with timestamp and name properties. The code defines a function formatDateString to format the timestamps into readable dates.
It then uses reduce to iterate over the testData array and group the objects by their formatted date. The resulting grouped data is displayed in the React component, rendering each formatted date as a heading and the corresponding objects as list items.
React Js Separate array of timestamps into days Example
<script type="text/babel"> const testData = [ { timestamp: "2022-04-12T19:25:39.950747+00:00", name: "note 1", }, { timestamp: "2022-04-12T19:25:39.950747+00:00", name: "note 2", }, { timestamp: "2022-05-12T19:25:39.950747+00:00", name: "note 3", }, { timestamp: "2022-05-12T19:25:39.950747+00:00", name: "note 4", }, { timestamp: "2023-06-12T19:25:39.950747+00:00", name: "note 5", }, { timestamp: "2023-06-12T19:25:39.950747+00:00", name: "note 7", }, ]; const App = () => { const days = [ "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", ]; const formatDateString = (dateString) => { const date = new Date(dateString); const timeZoneOffset = date.getTimezoneOffset() * 60000; // Convert minutes to milliseconds const correctedDate = new Date(date.getTime() + timeZoneOffset); // Adjust for time zone offset const day = days[correctedDate.getDay()]; const formattedDate = correctedDate.toLocaleDateString("en-GB"); // Format as "dd/mm/yyyy" return `${day} ${formattedDate}`; }; const notesByDay = testData.reduce((acc, data) => { const formattedDate = formatDateString(data.timestamp); if (acc[formattedDate]) { acc[formattedDate].push(data); } else { acc[formattedDate] = [data]; } return acc; }, {}); return ( <div className="container"> <h2>React Js Separate array of timestamps into days</h2> {Object.keys(notesByDay).map((formattedDate) => ( <div key={formattedDate}> <h2>{formattedDate}</h2> <ul> {notesByDay[formattedDate].map((data) => ( <li key={data.timestamp}>{data.name}</li> ))} </ul> </div> ))} </div> ); }; ReactDOM.render(<App />, document.getElementById("app")); </script>Output of React Js Separate array of timestamps into days
