I have the following xml file
<?xml version="1.0" encoding="utf-8"?>
<library xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="library.xsd">
<SingleBook>
</SingleBook>
</library>
And my clojure (1.5.1) program crashes and get a NullPointerException while calling (zip/branch?)
(let [f (.toFile (sh/getPath "lib.xml"))
dom (clojure.zip/xml-zip (clojure.xml/parse f))
top (clojure.zip/children dom)
]
(prn (first top))
(prn (clojure.zip/branch? (first top)))
)
I am new to clojure.zip and clojure.xml. Can anyone tell me why it crashes? Thanks.
When you get the children, you get the a seq of the content of the node, not the zipper itself. You will navigate from the top node and can keep using your zipper by clojure.zip/down
like this:
(clojure.zip/branch? (clojure.zip/down dom))
Check clojuredocs.org about xml-zip for more info!
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