This research has designed concrete planning and function module of the database at first, and supplied operation course, interface and concrete procedure code about relevant key module.
本研究首先对数据库的具体规划及功能模块进行设计，并给出了相关关键模块的操作、用户界面及具体程序代码。
Executes the specified function once for every key in the collection, passing each key, and its associated item as the first two parameters.
为集合里的每个键值执行指定的函数，传递每个键值作为第一参数和它相关的项作为第二参数。
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