You have an array of arrays and you want to find the ones that are named by some naming mechanism. Riiiight.

Arrays don't have named elements - hashes do. Arrays have numbered elements. That's the problem, brother.

Without seeing the code that builds @files, I can't tell you how to fix it and my fix for the snippet you posted will make no sense without showing you code to build it. :-)

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We are the carpenters and bricklayers of the Information Age.

Don't go borrowing trouble. For programmers, this means Worry only about what you need to implement.