Tcl

Iterate over Direct Children with a Specific Tag

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Demonstrates how to iterate over direct children having a specific tag.

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

<root>
    <fruit color="red">apple</fruit>
    <fruit color="green">pear</fruit>
    <veg color="orange">carrot</veg>
    <meat animal="cow">beef</meat>
    <xyz>
        <fruit color="blue">blueberry</fruit>
        <veg color="green">broccoli</veg>
    </xyz>
    <fruit color="purple">grape</fruit>
    <cheese color="yellow">cheddar</cheese>
</root>

Tcl

load ./chilkat.dll

set success 0

set xml [new_CkXml]

# child is a CkXml

# The sample input XML is available at http://www.chilkatsoft.com/data/fruit.xml
set success [CkXml_LoadXmlFile $xml "fruit.xml"]
if {$success != 1} then {
    puts [CkXml_lastErrorText $xml]
    delete_CkXml $xml
    exit
}

#  Get the number of direct children having the tag "fruit"
set numWithTag [CkXml_NumChildrenHavingTag $xml "fruit"]

if {$numWithTag > 0} then {

    for {set i 0} {$i <= [expr $numWithTag - 1]} {incr i} {
        set child [CkXml_GetNthChildWithTag $xml "fruit" $i]
        puts "$i: [CkXml_tag $child] : [CkXml_content $child]"
        delete_CkXml $child

    }
    puts "-----"

    # Do the same as the above loop, but instead of creating
    # a new object instance for each child, call GetNthChildWithTag2 to
    # update the object's reference instead.
    for {set i 0} {$i <= [expr $numWithTag - 1]} {incr i} {
        # Navigate to the Nth child.  
        set success [CkXml_GetNthChildWithTag2 $xml "fruit" $i]
        puts "$i: [CkXml_tag $xml] : [CkXml_content $xml]"
        # Navigate back up to the parent:
        set success [CkXml_GetParent2 $xml]
    }
    puts "-----"
}


delete_CkXml $xml