Yes, but not a whole lot to do with arrays honestly. And it's been a while since I've programmed in TGC's version of BASIC, however I'm finding it to be super, super easy and FAST. I love it.
I've already found a lot of examples of storing map data with 2D arrays, so it really will be easy to implement. However I'm not going to do it in this example because I want to perfect the undo/redo functions and make them very expandable so that it can be used for anything, not just a tile map editor.
EDIT: Holy amount of snow, Batman!
I live in Wisconsin and it's snowing something fierce at the moment. I was shoveling the driveway to dig our car out so that my mom could go pick up a brand new dog from the pound (we're getting a pitbull!

), and it took me half an hour and it was covered in snow again.
This next part needs a backstory so here it is.
For the last two weeks or so, our idiot mailman has been parking IN FRONT OF OUR DRIVEWAY, causing me, my father and my sister to all be late to work at one point or another. He gets out of his truck to deliver mail to three surrounding houses, and it takes him five or ten minutes. Last week he parked there while I was on my way home from work, causing me to wait almost 5 minutes for him to return. He looked at me and acted irritated at me.
So anyway, as I was out shoveling, he parks in front of our driveway again. I asked him, very politely, to please not do that anymore. He imeediately took a tone with me and said "Well what're you gonna do about it, kid?", and I just said that I was simply asking him not to do it anymore, please and thank you. Then he said that I was crazy and he was going to call the cops. I said "Seriously? How about I call the post office on you? Want me to do that?" and I walked around to try to get his number on the truck but it was blocked by snow. He then said something like "You're crazy, while you call the post office or the police or whatever I will wait right here!", and then sunk his feet into the snow. I just laughed and said "No, you're going to move your vehicle as my family is getting ready to leave, thank you", and went off to finish shoveling, and he just kept standing there. I told him once more, to move his vehicle, and he finally left, uttering profanities at me, threatening to not deliver our mail anymore and calling me crazy, so I shouted after him "You're an @$$hole!", and finished shoveling. I come inside, look up the post office number, and place a call. Turns out, I'm not the first person to call about him today! He's been parking in front of driveways all morning and being jerks to other people as well, blocking them in or out. When I told his supervisor what had happened this morning, she said they had been getting complaints for almost a whole week now. He's been warned many times and she said they would talk to him about again today after his shift. She said if there were anymore problems to give her a call and gave me her direct extension number.
Justice is served, Idiot Mailman! HAHAHAHAHAHAHA
Now I'm going to shower before work

Meh game development blaugh!