Re^10: Xpath value query

OK, so one more problem I don't understand.. and I think it's more my lack of understanding about HASHES. I was getting an error on the my $value = $nodes[0]->text; statement indicating Can't call method "text" on an undefined. So, I thought I could use if (@node[0]) { my $value = $nodes[0]->text; } else { $value = "EMPTY_STRING"; } but now everything comes back as if the variable is undefined. How do I determine if a hash is undefined?

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Re^11: Xpath value query by Corion (Patriarch) on Sep 19, 2015 at 14:50 UTC
`@node` is a different variable than `@nodes`. Also, hashes are accessed through `$hash->{ key }` not through `$hash->key`. Maybe see perldsc or perlreftut. You should really have this near the top of your program to enable Perl to tell you when you mistype variable names: `use strict;` [download]	[reply] [d/l] [select]
Re^11: Xpath value query by poj (Abbot) on Sep 19, 2015 at 15:07 UTC
Variables declared with `my` inside a block `{ .. }` are not accessible outside the block. You probably want something like `sub get_xpath_value { my ($xpath) = @_; my @nodes = $root->findnodes($xpath); my ($name,$value); # declare outside block if (defined $nodes[0]) { $value = $nodes[0]->text; # still accessible inside block $name = $nodes[0]->getName; } else { $value = 'not defined'; # or whatever you want $name = 'not defined'; } return ($name,$value); }` [download] poj	[reply] [d/l] [select]