My solution required marking each coord as non-empty when I dropped a rect on it. I was able to hack something that worked (non-zero-len string stuffed into th

My solution required marking each coord as non-empty when I dropped a rect on it. I was able to hack something that worked (non-zero-len string stuffed into the structure), but I'd much rather know what the structure was instead of guessing. p.s. 29 ha ha