gistfile1.js

// Create a custom subclass of View with a very simple rendering algorithm
var RowRowRowYourView = Y.Base.create('tableBody', Y.View, [], {
    render: function () {
        var tbody   = this.get('container'),
            rowData = this.get('modelList'),
            content = '';

        rowData.each(function (rowModel, index) {
            var stripe = index % 2 ? 'odd' : 'even',
                template = '<tr class="' + (index % 2 ? 'odd' : 'even') + '">' +
                    '<td>{username}</td><td>{first}</td><td>{last}</td>' +
                '</tr>';

            content += Y.Lang.sub(template, rowModel.toJSON());
        });

        tbody.setHTML(content);

        return this;
    }
});

var table = new Y.DataTable({
    data: [ ... ],
    columns: [ ... ],
    bodyView: RowRowRowYourView
}).render('#over-there');