Array entry removal problem

I've noticed in my code that deleting array entries doesn't always seem to work.

Since I'm new-ish to arrays, I didn't want to assume this is a bug. If anyone has a moment to test this, I've attached a file that reproduces the problem.

It creates an array of random numbers (0-1). Then it scans the array for entries with the number 1, and deletes them. But it only deletes a few (it should delete them all), so it makes another scan, and deletes a few more (again, should delete them all).

If you open the console you can see the results. Refreshing it a few times shows the inconsistency

Note: There's an option in here to overwrite the array entry, instead of deleting it. Overwriting the entries works every time, but deleting the entry is inconsistent.

Thanks for any insight!

https://drive.google.com/file/d/11wroFtK9fc-pG82ruW2j4dWti96KhdEy/view?usp=sharing

Without looking at the file I'm going to guess you've done for each row of the array if you find a 1 delete it, the problem with deleting a row is it moves the positions of the array so say you find a 1 at row 6 and delete it, the next row you would check would be row 7, this is now row 6 because it moved down, therefore it will seem to skip some 1s. If this isn't the problem then I can check the file later.

The trick is to start from the bottom of the array:

+ System: For "" from Array.Width-1 to 0

----+ Array: Value at LoopIndex = 1

-----> Browser: Warn in console: "Removing entry #" & (LoopIndex + 1)

-----> Array: Delete index LoopIndex from X axis

Genius, that did it! Thanks to you both for the fast help.