Once in a while you might want to get a resource index out of it's string name, like so:
instance_create(x, y, 'obj_item' + string(irandom_range(1, 3)));
But, resource indexes aren't strings, so that wouldn't work.
You could add indexes into an array, or have a little switch-statement, but take a bit to set up.
So let's see what else you can do about this,
Image: Those awesome futuristic tiles by Morphosis, now in a single aligned image.
I've always found standard resource packs that can be downloaded from site of YoYoGames, however rarely ever used something from them because it took multiple minutes to simply look through everything in there in attempt to find something matching.
So, decision was made to improve the situation a little bit, at least for myself.
Changes include graphics being sorted into categorized folders nicely, transparent background color in graphics, relevant tilesets being merged into larger images, and more. Overall, if you've ever considered using original pack, you might find this useful as well.
See ReadMe for more information.