fre | : ghost : Tiny Footprint Concurrent UI library for Fiber | Frontend Framework library

I think you want to reverse the roles of i and j.

I added the thing I was trying to tell you in comment here.

Use DataFrame.pivot with convert datetimes to month periods by Series.dt.to_period:

players is a string, not an array, seeing as console.log(players[0]) displays '['. I don't know why, from the code, since you call JSON.parse. Perhaps you have saved the players array incorrectly to localstorage, for example by using JSON.stringify twice. We don't have the code you used to store the data to localstorage.

let evaluates arithmetic expressions. When you want to concatenate strings, you don't need arithmetic expressions, so drop the let.

See: What's the simplest way to print a Java array?

If you can use numpy, you can create an outer dictionary first with all the col1 first values as keys. The set operation takes care of multiple occurrences of those values. Then you can iterate over all keys in your dict and generate new ones.

you can hide this is in CSS easily no need to do anything in ReactJS

autocomplete renders as an unordered list so something like this

Create an onChange handler that consumes the outer and inner array indices, and onChange event and map the old state to the new state using the map index to match the object you want to update.