摘要：
javascript中数组是没有indexOf方法，extjs中给数据添加了该方法 1 Ext.applyIf(Array.prototype, { 2 3 /** 4 * Checks whether or not the specified object exists in the array. 5 * @param {Object} o The object to check for 6 * @param {Number} from (Optional) The index at which to begin the search 7 *... 阅读全文
