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Re: Pushing Array ref to array

by hardburn (Abbot)
on Feb 01, 2012 at 16:15 UTC ( #951258=note: print w/replies, xml ) Need Help??

in reply to Pushing Array ref to array

The problem is that each entry in @result is a reference to @row, but because @row is declared at the top of the code, you change the contents of @row each time through. Instead, you need to create a new variable each time through the loop.

This is quite easy:

while (my @row = $sth->fetchrow_array()) { ... }

And you should be able to delete the my @row; line at the top of the code.

Here's something that may help you understand better: Lexical scoping like a fox.

"There is no shame in being self-taught, only in not trying to learn in the first place." -- Atrus, Myst: The Book of D'ni.

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Re^2: Pushing Array ref to array
by packetstormer (Monk) on Feb 01, 2012 at 16:42 UTC
    Thanks to you both. That worked but I really should have known better!
    Thanks again.

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[Cosmic37]: I am out of practice; I use Perl for scientific programming for number crunching
[Corion]: Cosmic37: Basically, you read one file into a hash, keyed by your key, and then match the lines from the second file to that hash
[Cosmic37]: note that the two files only have datetimes which may match whereas other data per line is different format in file1 and file2 - is that really intersection?
[jedikaiti]: Hi Monks
[Corion]: Cosmic37: Well, if you want to use only parts of a line for the key, see split or whatever other mechanism to extract the key from the line
[Corion]: Hi jedikaiti!
[Cosmic37]: is there a webpage for full CB for this chat rather than side panel chat?
[Cosmic37]: thank you for advice
[Cosmic37]: peach greets jedi
[Cosmic37]: ok this one works better fullpage chat

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