vida | Flexible data viz using redwoodjs framework | Data Visualization library

usort() should do it:

As @pavel pointed out, using a URL parameter should work for you. Every item must have a unique number or name associated with them.

Do not use their array index or similar, because that will change in the future.

Your example code has $row use numeric indexes - whichever one of them is unique you can use as a URL parameter. If you don't have one, you have to create one. Preferably one that will not change when the data is updated. That is where databases will use numeric IDs, but you can use a string as well, as long as you can identify the item from the details.php.

Example link: $link="details.php?id=" . $row[2];. Replace 2 with whatever is a unique number / name for every row.

Instead of only supplying the $row in your function, you can supply the row's ID as a separate parameter if that is what you need. Depends on how you organized this outside of your example code.

In this case you change the function as well:

Instead of going to every path you can use below code :

The following writes the full paths of the files in each group to a file named for the group's grouping criterion, such as el arte.txt for the first group:

Group-Object accepts a calculated property expression in place of a property name, meaning we can do something like this:

So basically, since it's an array - we can modify its content. So:

We can use nchar with min on the substr

Have you tried dplyr?

P5.js is not meant to be used outside of the browser. However, if you must, it can technically be made to work. I've posted an example below (which you can also view and run via my Repl.it project). But beware, there is no guarantee this will work for your use case. Just getting the canvas's image data to write to a file for this example was a humungous pain, so your mileage may vary.

index.js