Re^3: Learning about hashes

     my %eslist = $record[3];
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That code declares a hash variable (using my) and assigns a single scalar value to the hash. In the words of diagnostics

(W) You specified an odd number of elements to initialize a hash, 
which is odd, because hashes come in key/value pairs.
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What is in $record[3]? What other data do you want to associate with $record[3]? If you show us a small sample of data, we could probably suggest how you might store the data in a hash.

Give perldata a quick read.

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Re^4: Learning about hashes by molson (Acolyte) on Oct 16, 2009 at 16:16 UTC
`record[3]` is a bunch of numbers. I'm trying to find all unique entries. From what I've read a hash is the best way to do this, but I'm having trouble understanding how to assign a key to the `record[3]` value. Is a key like a primary key in a database? Where it is essentially a arbitrary unique number used to refer to the entry?	[reply] [d/l] [select]