In my experience, hashes use about 15% more memory than arrays for similar data with constants for array indexes. This is not a good enough reason to obscure your program. Use the data structure that makes the most sense for your code and will be the most readable for future maintainers.
Comment on Re: Comparing memory requirements for hashes and arrays
Your experienced guess is good enough for me, brother perrin. Thank you++.
And 15% more for hash is is small price to pay for convenience and flexibility of hashes, as tilly said. We need to store also keys. 15% is less than I expected... /me have no more concerns about using hashes. Thank you all!
pmas
To make errors is human. But to make million errors per second, you need a computer.