Dojo is a portable Javascr ipt toolkit for web application developers and Javascr ipt professionals. Dojo solves real-world problems by providing powerful abstractions and solid, tested implementations.-Alternatives is a portable Javascr ipt tool

一个适用于超市的电子秤系统，包括数据库系统。-a supermarket in the electronic weighing system, including the database system.

用天平称重时，已知给定的砝码，求解最多能称出多少不同的重量。-With weighing scales, it is known that a given weight, solving most able to call out the number of different weight.