Copy DataSource

HTML

<link rel="stylesheet" href="http://cdn.kendostatic.com/2013.2.716/styles/kendo.common.min.css">
<link rel="stylesheet" href="http://cdn.kendostatic.com/2013.2.716/styles/kendo.default.min.css">
<script src="http://cdn.kendostatic.com/2013.2.716/js/jquery.min.js"></script>
<script src="http://cdn.kendostatic.com/2013.2.716/js/kendo.all.min.js"></script>
<script src="http://demos.kendoui.com/content/shared/js/people.js"></script>
<button id="copy" class="k-button">Copy DataSource</button>
<div id="grid1"></div>

CSS

#grid {
    width : 490px;
}

JavaScript

var data = [
  {
    "id": 69262,
    "type": "problem",
    "name": "Master row 1"
  },
  {
    "id": 69263,
    "type": "problem",
    "name": "Master row 2"
  },
  {
    "id": 1043,
    "type": "goal",
    "name": "Child row 1",
    "parentProblem": 69263,
  },
  {
    "id": 1043,
    "type": "goal",
    "name": "Child row 2",
    "parentProblem": 69263,
  }
];

var scope = new kendo.data.ObservableArray(data);
var scope2 = new kendo.data.ObservableArray(data);

var prevent = false;
var prevent2 = false;

var grid1 = $("#grid1").kendoGrid({
    dataSource: {
        data: scope,
        filter: { field: 'type', operator: 'eq', value: 'problem' },
        change: function (e) {
            if (e.field)
                prevent = true;
        }
    },
    dataBinding: function (e) {
        if (prevent)
            e.preventDefault();
        
        prevent = false;
    },
    scrollable: false,
    editable: true,
    columns: [
        { field: 'name', title: 'Name' },
    ],
    detailInit: detailInit
});

function detailInit(e) {
    $('<div/>').appendTo(e.detailCell).kendoGrid({
        dataSource: {
            data: scope2,
                change: function (e) {
            if (e.field)
                prevent = true;
        },
            filter: [
                { field: 'type', operator: 'eq', value: 'goal' },
                { field: 'parentProblem', operator: 'eq', value: e.data.id }
            ],
        },
        scrollable: false,
        editable: true,
        columns: [
            { field: 'name', title: 'Name' },
        ]
        
    });
};

$("#copy").on("click", function() {
    console.log(blah.data[2].name);
    //ds1.at(0).set('name', 'test');
    //blah.data[0].name = 'test';
    //console.log(ds1.at(0));
    
    //var ds2 = ds1;
    //ds2.serverPaging = false;
    //ds2.pageSize = 0;
    //grid2.setDataSource(new kendo.data.DataSource(ds2));
});