因此，懂得运用哪些其他的程序，如何将他们合并起来，变得尤为重要。 而如何创建那些基本的模块反而不那么重要了。
So it is becoming more important to know what other programs you can use as building blocks and how to stick them together, and less important to know how to build basic "plumbing" yourself.
我也合并代码来查询输入消息的类型(清单13)并明确地将附件类型(清单14)设置到基本的处理程序(清单7)的实现中。
I also incorporated code to query the type of incoming message (Listing 13) and explicitly set the attachment type (Listing 14) into the implementation of a basic handler (Listing 7).
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