Re^2: hash of hash - incorrect values?

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Re^3: hash of hash - incorrect values? by ikegami (Patriarch) on Aug 03, 2005 at 19:40 UTC
You misunderstand `$hash{a}{b}`. Hashes only have one level. `$hash{a}{b}` is a hash of a hash. `$hash{a}{b}` is a shortcut for `${$hash{a}}{b}`. That means "the value at key 'b' in the hash referenced by `$hash{a}`." `$hash{a}` can't contain both a hash reference and a number, so `$hash{a}++` and `$hash{a}{b}` conflict. There is an easy solution. Replace `$Stats{$DestPort}++; $Stats{$DestPort}{covert}{"..."}++;` [download] with `$Stats{$DestPort}{total}++; $Stats{$DestPort}{covert}{"..."}++;` [download] or `$Stats{$DestPort}{total}++; $Stats{$DestPort}{item}{covert}{"..."}++;` [download]	[reply] [d/l] [select]
Re^3: hash of hash - incorrect values? by VSarkiss (Monsignor) on Aug 03, 2005 at 19:42 UTC
Time to (re-)read perlref and perllol. Your `$Stats{$Destport}` is a hash value -- a scalar. That scalar can be a number, a string, or any other thing a scalar can hold, including a reference to another hash. Think carefully about what you want to keep in your data structure. Possibly you need another key: `$Stats{$Destport}{count}++;`I can't tell if that's the right thing to do, since I'm not sure what the increment is doing. Do not rebuke them with harsh words ... but rather lead them gently - with URLs - so that they may learn wisdom.	[reply] [d/l] [select]