selects the specified item(s)
| id | string| array | the id of a single item or an array of items ids | 
| preserve | boolean | if it's set to true, the method won't affect the existing selection (will select new items while preserving selection of old items). The default value - false | 
webix.ui({
    view:"dataview",
    id:"data",
    // ...
});
$$('data').select(2);               //selects an item with the id=2
$$('data').select(3, true);         //selects an extra item, preserving previous selection
 
$$('data').select([2,3,5]);         //selects a group of items with ids: 2,3,5
If the parameters aren't specified, all items will be selected.
    $$('data').select();                     //selects all items