Re: How to check if an array element reference exists or not

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Re^2: How to check if an array element reference exists or not by corpx (Acolyte) on Apr 14, 2010 at 08:52 UTC
I tried both those cases, but they always return false and the print statement never gets executed, even when such a cell exists.	[reply]
Re^3: How to check if an array element reference exists or not by Corion (Patriarch) on Apr 14, 2010 at 08:57 UTC
So, how do you determine that "such a cell exists"? I recommend printing your data structure: `use Data::Dumper; print Dumper $row;` [download] That will show you whether such a cell exists in `$row`. Maybe it's the 7th cell, which would be at `$row->[6]`. Usually, when Perl says that `defined $row->[7]` is false, Perl is right.	[reply] [d/l] [select]
Re^4: How to check if an array element reference exists or not by corpx (Acolyte) on Apr 14, 2010 at 09:16 UTC
Thanks for the reply. Maybe these screen shots of the debugger will explain my question. http://i42.tinypic.com/1zv75lh.jpg In this case, I want the if statement to return a false. http://i44.tinypic.com/a3i1ed.jpg In this case, I want it to return true, so the print statement gets executed. With `if ( defined $row[7] )` and `if ( $row[7] )`, neither returns true in the case of the second screen shot.	[reply] [d/l] [select]
Re^5: How to check if an array element reference exists or not by almut (Canon) on Apr 14, 2010 at 09:26 UTC
Re^6: How to check if an array element reference exists or not by corpx (Acolyte) on Apr 14, 2010 at 10:05 UTC
Re^5: How to check if an array element reference exists or not by Corion (Patriarch) on Apr 14, 2010 at 09:23 UTC
Re^6: How to check if an array element reference exists or not by corpx (Acolyte) on Apr 14, 2010 at 10:04 UTC
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