(Swift 3,4,5...) Demonstrate the XML UpdateAttrAt Method

Demonstrates the XML UpdateAttrAt method to update attribute name/value pairs in XML.

Note: This example requires Chilkat v9.5.0.64 or later.

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func chilkatTest() {
    // Note: This example requires Chilkat v9.5.0.64 or later.
    let xml = CkoXml()!

    xml.tag = "animals"

    var autoCreate: Bool = true

    // When the autoCreate argument equals true, the UpdateAttrAt
    // method auto-creates the children as needed:
    xml.updateAttr(at: "penguin", autoCreate: autoCreate, attrName: "feature", attrValue: "flightless bird")
    xml.updateAttr(at: "mammal|rodent|squirrel", autoCreate: autoCreate, attrName: "feature", attrValue: "bushy tail")
    xml.updateAttr(at: "mammal|rodent|rat", autoCreate: autoCreate, attrName: "feature", attrValue: "long hairless tail")

    // Show the XML
    print("\(xml.getXml()!)")

    // 	<?xml version="1.0" encoding="utf-8" ?>
    // 	<animals>
    // 	    <penguin feature="flightless bird" />
    // 	    <mammal>
    // 	        <rodent>
    // 	            <squirrel feature="bushy tail" />
    // 	            <rat feature="long hairless tail" />
    // 	        </rodent>
    // 	    </mammal>
    // 	</animals>
    // 

    // Now update each node's "feature" attribute..
    xml.updateAttr(at: "penguin", autoCreate: autoCreate, attrName: "feature", attrValue: "black and white")
    xml.updateAttr(at: "mammal|rodent|squirrel", autoCreate: autoCreate, attrName: "feature", attrValue: "grey, red, or black")
    xml.updateAttr(at: "mammal|rodent|rat", autoCreate: autoCreate, attrName: "feature", attrValue: "brown, grey, white, or black")

    print("\(xml.getXml()!)")

    // 	<?xml version="1.0" encoding="utf-8" ?>
    // 	<animals>
    // 	    <penguin feature="black and white" />
    // 	    <mammal>
    // 	        <rodent>
    // 	            <squirrel feature="grey, red, or black" />
    // 	            <rat feature="brown, grey, white, or black" />
    // 	        </rodent>
    // 	    </mammal>
    // 	</animals>
    // 

}