Extjs combobox 去重

store增加load事件，执行each遍历找出重复的记录进行删除

    var store = Ext.create('Ext.data.Store', {        listeners: { load: function () {            var k, repeat = [], state = {};            this.each(function (r) {                k = r.get('需要去重复的键名称');                if (state[k]) repeat.push(r);                else state[k] = true;            });            this.remove(repeat);        }         }    });