目录一、jsONPath 简介二、基础语法详解1. 根元素与子节点2. 通配符与多选三、数组操作深度解析1. 索引与切片2. 递归下降操作符四、高级查询技术1. 过滤表达式2. 复杂条件组合五、函数扩展（实现相关）1. 常用函数2.
I want to update a file using FLex3/AIR File class. I know how to do this , but before writing(updating) to file i want to check if current file is open in the OS or some 开发者_运维百科other applicat
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