Revision history for Perl extension Tie::Hash::Expire. 0.01 Thu Jan 29 16:27:58 PST 2004 - original version 0.02 - If "expire_seconds" is set to zero all hash keys will expire immediately. If "expire_seconds" is omitted or set to undef hash keys will not expire at all. - Support for Time::HiRes included. If Time::HiRes is available, expiration will occur at the highest resolution available through that module. Decimal expiration times are now available. If decimal expirations are specified and Time::HiRes is not available, a warning is generated, but the code will function as though the next larger integer was specified. 0.03 - Bug Fix: Fixed problem with keys expire during iteration with FIRSTKEY / NEXTKEY