Reset table and change datasource

[tdesc]

Hello,
I need to display different columns and items in data-table
Is there way to reset table and fill it again?
When I get new dataset with changed ( items and cols ) data-table-cell start to duplicate it content.

<iron-data-table id="table" items="[[searchResult]]" page-size="{{limit}}"> <template is="dom-repeat" items="[[columns]]" as="col" index-as="bdex"> <data-table-column zdex="[[bdex]]" zcol="[[col.property]]" flex="[[_columnFlex(col)]]" name="[[col.header]]" width="[[col.width]]" hidden="[[col.inactive]]"> <template is="header">[[col.header]]</template> <template> <div class='A-card'>[[_getItem(index,column.zdex,column.zcol)]]</div> </template> </data-table-column> </template> </iron-data-table>