How do you trigger autocomplete “select” event manually in jQueryUI? OR Set Default value in JqueryUI autocomlete

$(this).data('ui-autocomplete')._trigger('select', 'autocompleteselect', {item:{value:$(this).val()}});

$("#myAutocomplete").autocomplete({}).data('ui-autocomplete')._trigger('select', 'autocompleteselect', { item: availableTags[i] });

$( "#myAutocomplete" ).autocomplete({  // do whatever
}).val('Banana').data('autocomplete')._trigger('select');