[coryrc]

> What is a "wrong data structure"?

I've seen people use multiple named arrays, search for something in the first array, then use its index to find matching data in the other arrays, instead of a dictionary of string:tuple.

Another example is languages with arrays and vectors, usually one or the other is preferred. In Go you can use arrays but you're supposed to use slices whenever possible, while the opposite would be appropriate in, say, C.