(Swift 3,4,5...) XML Sort by Content

Demonstrates the SortByContent method.

The input XML, available at http://www.chilkatsoft.com/data/fruitSort2.xml, is this:

<root>
    <fruits>
        <apples>
            <apple>fuji</apple>
            <apple>gala</apple>
            <apple>granny smith</apple>
            <apple>honeycrisp</apple>
            <apple>mcintosh</apple>
        </apples>
        <fruit>banana</fruit>
        <fruit>blackberry</fruit>
        <fruit>blueberry</fruit>
        <fruit>orange</fruit>
        <fruit>pear</fruit>
    </fruits>
</root>

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

func chilkatTest() {
    let xml = CkoXml()!
    var xSortRoot: CkoXml?

    var success: Bool
    // The sample input XML is available at http://www.chilkatsoft.com/data/fruitSort2.xml
    success = xml.loadFile("fruitSort2.xml")
    if success != true {
        print("\(xml.lastErrorText!)")
        return
    }

    // Sort the direct children under the "fruits" node by tag:
    xSortRoot = xml.findChild("fruits")

    // Sort in ascending order.
    var bAscending: Bool = true
    xSortRoot!.sort(byContent: bAscending)

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

    // Note:  The "apples" node contains child nodes, but its 
    // text content is 0-length (empty).  Therefore, when sorting in
    // ascending order, it will be positioned before the direct
    // children containing non-empty content.

    // <root>
    //     <fruits>
    //         <apples>
    //             <apple>granny smith</apple>
    //             <apple>gala</apple>
    //             <apple>fuji</apple>
    //             <apple>mcintosh</apple>
    //             <apple>honeycrisp</apple>
    //         </apples>
    //         <fruit>banana</fruit>
    //         <fruit>blackberry</fruit>
    //         <fruit>blueberry</fruit>
    //         <fruit>orange</fruit>
    //         <fruit>pear</fruit>
    //     </fruits>
    // </root>

    // Sort the direct children under the "apples" node:
    success = xSortRoot!.findChild2("apples")

    xSortRoot!.sort(byContent: bAscending)
    print("\(xml.getXml()!)")

    // <root>
    //     <fruits>
    //         <apples>
    //             <apple>fuji</apple>
    //             <apple>gala</apple>
    //             <apple>granny smith</apple>
    //             <apple>honeycrisp</apple>
    //             <apple>mcintosh</apple>
    //         </apples>
    //         <fruit>banana</fruit>
    //         <fruit>blackberry</fruit>
    //         <fruit>blueberry</fruit>
    //         <fruit>orange</fruit>
    //         <fruit>pear</fruit>
    //     </fruits>
    // </root>

    xSortRoot = nil

}