iOS TableViewController在状态栏下滚动内容和导航栏(iOS TableViewController Scrolling away content and navigation bar under status bar)

 
 
 在node.js中编写应用程序的所有业务逻辑是否常见？ 
 
 
 将node.js用于REST接口和所有业务应用程序逻辑是很常见的。 除非你已经有一堆用其他语言编写的代码或其他令人信服的理由使用另一种语言的代码，否则你可以在node.js中直接实现核心逻辑，而不是将更多的动作部分引入拼图。 
 
 
 
 如果我使用node.js构建其余服务并将业务逻辑放在另一种语言中（例如：Python，Java，Ruby），如何集成它们？ 
 
 
 集成它们有很多选择，它实际上取决于你正在做什么。 您可以让node.js中的REST接口为每个请求以另一种语言运行另一个进程，或者您可以在服务器上运行另一个进程，您可以使用任何可用的进程间通信技术（套接字，http请求等）进行通信。 ）。 
 
 
 
 关于node.js的许多文章都引用了一些NoSQL DB，比如MongoDB。 使用带有RDBMS的node.js（如Mysql或Postgres）是不是很糟糕？ 
 
 
 选择数据库应该是将数据库的类型与您的特定需求相匹配，并且几乎不需要使用您正在编码的语言。您通常可以使用任何语言的任何主流数据库。 因此，请根据您的需求选择最适合您的数据库，而不是根据您编写的语言。 
 
 将node.js与RDBMS一起使用并不是一个坏习惯，只要这是满足您需求的最佳数据库类型。 

 
 
Is it common to write all business logic of application in node.js?
 
 
It is common to use node.js for both the REST interface and all the business application logic. Unless you already have a bunch of code written in some other language or some other compelling reason to use code in another language, then one may as well just implement the core logic right in node.js and not introduce more moving parts into the puzzle.
 
 
 
If I use node.js to build the rest service and put the business logic in another language (e.g: Python, Java, Ruby), how to integrate them?
 
 
There are many choices for integrating them and it really depends upon what you're doing. You could have the REST interface in node.js run another process in another language for each request or you could have another process on your server already running that you would communicate with using any interprocess communication technique available (sockets, http requests, etc...).
 
 
 
Many articles about node.js refer to some NoSQL DB, like MongoDB. Is it a bad practice use node.js with a RDBMS (like Mysql or Postgres)?
 
 
Choosing a database should be about matching the type of database to your particular needs and should have little to do what what language you are coding in. You can generally use any mainstream database from any language. So, choose the database based on the best fit for your needs not based on what language you're coding in.
 
It is not a bad practice to use node.js with an RDBMS as long as that's the best type of database for your needs.