selena | tool used to test website performance | Performance Testing library

Your React container component will initially render with a broken image and audio player. The audio player doesn't recover so the second audio source element doesn't load correctly

1. When the fetch data call takes time, you should prevent the undefined song from rendering or set a default song to play. Detailed answer: Add a new second return statement after the useEffect. When songs is an empty array (which you set as default on line 4) then return a spinner or return null (React will not render the component, it's basically skipped). OR secondary solution is to set better defaults on line 4 to be an image and song that has a valid path so it will load before the long running fetch data call.
2. In the existing render, set the song to automatically play so the user doesn't need to press play. Detailed answer: Use the autoplay HTML attribute on the audio JSX element (ie )
3. Add defensive code for your fetch data call. Add a try / catch inside your useEffect so server errors are caught and handled. To prevent your component from crashing

You should use map to display an array in React.

Read more: https://reactjs.org/docs/lists-and-keys.html

You can use row_number() with CTE to get the highest sales for each manager as below:

bulkWrite with updateOne's with $upsert:true seems to work best for you...

You are getting an array at the top level instead of a JSON object. You should use JSONArray instead of JSONObject to parse the inital response object.

Either add a background color, like this:

super.x() is a way to invoke methods from your parent class.

Attributes is not a method. In fact, that Attributes() {} at the very end of your paste isn't a method either; it's a constructor.

If you want to make a new Attributes object, you use the new keyword, and super is right out - you can't use super to invoke such things. But you don't have to - just new Attributes(); will do it, because super has only one purpose - that is to differentiate the call to the method in your own class vs. the version you overrode. Thus:

You're looking for this:

Credit @ewong for this workaround solution

The code worked after adding in options when initializing the client even though I didn't need them. I'll be filing an issue @https://github.com/msoulier/tftpy to see if this is a bug that needs to be addressed or a deliberate choice.

Solution code: