Find all nodes that have an attribute that matches a certain value with scala

Question

I saw the following example on Nabble, where the goal was to return all nodes that contain an attribute with an id of X that contains a value Y:

//find all nodes         


        

Answer 1

First, XML are literals in Scala, so:

val xml = 
hello
hello

Now, as to the problem:

def attributeValueEquals(value: String)(node: Node) = {
     node.attributes.exists(_.value.text == value)
}

In fact, I'd have used "exists" instead of "filter" and "defined" for the original problem as well.

Finally, I personally prefer operator style syntax, particularly when you have a ready function, instead of an anonymous one, to pass to "filter":

val testResults = xml \\ "_" filter attributeValueEquals("test")

The original mixes operator style for "\\" and dot style for "filter", which ends up quite ugly.