This is true to some extent, but in this case, I wanted to make
sure that the entries were processed in the proper order, being from highest to lowest. That
they happen to sort both numerically and alphabetically is indeed curious, however the addition of 'y' for years would throw that out of whack, and is a style of programming best reserved for Golf.
The behaviour of 'keys %time_value' is not always in the order
they were added, at least under some historical versions of Perl. Best to avoid making assumptions, I suppose. As much as
I don't like maintaining inter-related structures, such as these, I didn't want to make a sort_by_value routine even more.
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