Question

I want to store the output in an array and remove the duplicates

 $(document).ready(function() {
    $.ajax({
        type: "GET",
        url: "cview.xml",
        dataType: "xml",
        complete: function(data, status) {
            parseXml(data.responseXML);
        }
    });
});

function parseXml(xml) {
    $(xml).find("containmentView").each(function() {

        var tabarr = $(this).attr("type");
        alert(tabarr);


    });

}

XML feed

 <?xml version="1.0" encoding="utf-8"?>
        <entry>
        ----
        ----
        <cView type="D1">
                        <field name="TargetObjectClass">Disk</field>
                        <field name="TargetObjectName">DISK A1</field>
                        <field name="DisplayName">DISK-Name</field>
                        <field name="MaxAvgDataRate KB/sec">50.00 KB/sec</field>
                        <field name="MaxAvgQueueDepth">50.00</field>
                    </cView>
                    <cView type="D2">
                        <field name="TargetObjectClass">Disk</field>
                        <field name="TargetObjectName">DISK B2</field>
                        <field name="DisplayName"> Disk-Name 2 </field>
                        <field name="MaxAvgDataRate KB/sec">60.00 KB/sec</field>
                        <field name="MaxAvgQueueDepth">60.00</field>
                    </cView>


        ...
        </entry>

Answer 1

In ExtJS you could use the unique function:

var uniqueArray = Ext.Array.unique(duplicatesArray);

It seems like you are mainly using jQuery though, if you were to ExtJSify your code the operation would be something like this:

var uniqueArray = []

Ext.define('myModel', {
    extend: 'Ext.data.Model',
    fields: [
        {name: 'TargetObjectClass', type: 'string'},
        {name: 'TargetObjectName', type: 'string'},
        {name: 'DisplayName', type: 'string'},
        {name: 'MaxAvgDataRate KB/sec', type: 'string'},
        {name: 'MaxAvgQueueDepth', type: 'numeric'}
    ]
});

var myStore = Ext.create('Ext.data.Store', {
    model: myModel,
    proxy: {
        type: 'ajax', 
        url: 'cview.xml',
        reader: 'xml'
    },
    autoLoad: true,
    listeners: {
        load: function(store) {
            uniqueArray = Ext.Array.unique(store.getRange());
        }
    }
});

The records would also get each of the Ext.Model properties so they can be sorted, etc.