Perl: hash tying

amnesty_puppy · 01-13-2005, 04:59 AM

I'm doing a Perl project for my computing A level (UK) and I'm using hash ties to access a database. When using multiple ties it seems that all the hashes are tied to the same object, where early in the program I have a tie to one hash with a certain contents I later tie a different hash and it has all the old keys and values as well, ones that haven't been overwritten. How can I make it create a new hash each time I want a tie?

Thanks, Dom.

chrism01 · 01-17-2005, 11:03 PM

You can either:
1. tie each new hash to a new file
2. Clear and re-use same file over again like this:
tie(%hash, "DB_File", $filename);
%hash = ();
untie %hash;