Вы можете загрузить ArrayStore Explicity, например,
var multWaqrranty = new Ext.data.ArrayStore({
// store configs
autoDestroy: true,
// reader configs
fields: [
{name: 'value', type: 'float'}
]
});
{
xtype: 'combo',
id: 'multiplier',
triggerAction: 'all',
store: multWaqrranty,
mode: 'local',
fieldLabel: 'Multiply',
valueField: 'value',
displayField: 'value'
}
// load data
multWaqrranty.loadData([[1,1], [1.5,1.5]],false);
// load new data
multWaqrranty.loadData([[0.25,0.25], [0.4,0.4], [1,1]],false);