How do I Check If An Array Cell is Empty?

Im trying to figure out how to check if an array cell is empty,if anyone knows of this it would be awesome to have help.

system compare: array.at(yourx,youry) = 0 (or "" if you mean an empty string)

if you need to go through the whole array and do something with all elements that have a specific value, you can use this:

array for each element XYZ

system compare array.at(array.curx,array.cury,array.curz) = yourvalue : your actions

mindfaQ so this would work if I was trying to make my tiles change?

For example Im trying to make my dirt block turn into a grass covered dirt block but only if the cell above it is free.

Thats why I wanted to know.

Yeah, if you have a 2D-array the tile above would be array.at(array.curx,array.cury-1), left would be array.at(array.curx-1,array.cury) and so on. Be careful on the edges though, as array.at(-1,0) doesn't exist.

mindfaQ

Im not understanding something here bro,This is a way to check just one cell?

Or can I run this through the whole array?

It would be awesome to see a visual representation of this but nonetheless I still would love to learn from you.

I never used array.at before.Im just getting used to arrays in general

What I have so far is

On Start of layout

        For each XY set value at (array.curX,array.curY) to floor (1)

        Create object tiles on layer 0 at (array.curx.array.cury)

        TileArray.CurY > 5

I gave you the answer in my first post.

s000.tinyupload.com/index.php

mindfaQ

Thank you so much for showing me what you ment!! You actually shown me a few things I did not know along with my main issue.

I know you might have told me in an earlier post but I am more of a visual learner. Most teachers have a chalkboard, in our case its a CapX file.thank you once again for your helping hand.

mindfaQ

One thing your capX dosnt show is how to make the upper most cells the same value all while keeping the rest at random.

I know that round (random (0,4)) will mix things up but how will I dictate that my top cells all stay the same value?

Could I say an empty cell is 0 and if its true that the cell is 0 I could switch frames accordingly?

You can select your first line in the same fashion as you already know ("TileArray.CurY > 5") just use = 0 and curx