Re: simple matrix

Thanks to all of you. Appologies for the sloppy coding, I thought I was saving time in trying to do this little test, but obviously that doesn't pay!! I needed to keep using @row to add to the array because this will happen in a loop, so as long as variables are local and I contain it in {} it works - great! The hash of arrays is probably my best bet as all users have unique usrName.

Comment on Re: simple matrix

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Re^2: simple matrix by ikegami (Patriarch) on May 04, 2006 at 16:40 UTC
Here's an updated solution given the new context. Doesn't work: `for (...) { @row = (); ... push(@maxtrix, \@row); }` [download] Works: `for (...) { my @row; ... push(@maxtrix, \@row); }` [download] In the first, each row of the matrix is a reference to the same array (`@main::row`). In the second, a new lexical is created every time through the loop, so each row of the matrix is a reference to a different array. For example, Read more... (1376 Bytes)	[reply] [d/l] [select]

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Re^2: simple matrix
by ikegami (Patriarch) on May 04, 2006 at 16:40 UTC

Here's an updated solution given the new context.

Doesn't work:

for (...) {
   @row = ();
   ...
   push(@maxtrix, \@row);
}
[download]

Works:

for (...) {
   my @row;
   ...
   push(@maxtrix, \@row);
}
[download]

In the first, each row of the matrix is a reference to the same array (@main::row).
In the second, a new lexical is created every time through the loop, so each row of the matrix is a reference to a different array.

For example,