External data into Processing

ClausNeergaard

Hey guys,

I am fairly new to this external-data-into-Processing stuff, so I am wondering what I am doing wrong with this tiny piece of code ...

XML root               = loadXML("http://www.w3schools.com/xml/cd_catalog.xml");
XML[] year             = root.getChildren("CATALOG/CD/YEAR");

for (int i = 0; i < year.length; i++) {
  println(year[i]);
}

Thanks in advance!

KevinWorkman

What does this code do? Does it throw an exception? Behave strangely? Something else?

Why are you passing an entire a tag into the loadXML() method? It just expects the URL, not the entire tag. Also, you either have to escape inner quotation marks, or use single quotes instead.

ClausNeergaard

Hey KevinWorkman -

Thanks for the quick reply.

It should - at least that's what I am trying to do - be able to print the each of the years represented in the cd_catalog.xml-file.

But the problem is that it doesn't do anything ... It doesn't println(year) of each of the catalogued CD's in the text/message area?

Thanks.

ClausNeergaard

Sorry about that - I misunderstood your question ... I haven't passed an entire tag into the loadXML() method. I am unsure why it shows up like that in the code, as I have only placed the following in the loadXML() method:

XML root = loadXML("http://www.w3schools.com/xml/cd_catalog.xml");

KevinWorkman

Can you do some debugging? Try printing out the value of root.toString(). What does that show you?

PhiLho

You must omit the root from your XQuery:

XML[] years = root.getChildren("CD/YEAR");