NERDTree 和缓冲区处理
我已经设置了一个基于 VIM 和 NERDTree 的“IDE”，用于使用 FreePascal 进行编程。总的来说，它工作得很好，但我找不到如何告诉 NERDTree 更改它关于 VIM 缓冲区的默认行为。
目前，每次我在 NERDTree 中打开文件时，它都会创建一个新的缓冲区。如果文件已经在另一个缓冲区中打开，那么最好有一个快捷方式可以直接转到前一个缓冲区，而不是为同一文件创建一个新缓冲区。这对于必须在文件之间来回切换的程序员特别有用。
有什么提示吗？
I've setup an "IDE" based on VIM and NERDTree for programming using FreePascal. Overall, it's working great, but I can't find how to tell NERDTree to change it's default behavior regarding VIM buffers.
Currently, every time I open a file in NERDTree, it creates a new buffer. If the file is already open in another buffer, it could be nice to have a shortcut to just go to the former buffer, instead of creating a new one for the same file. This could be specially usefull for programmers who must go back and forth between files.
Any hint?
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好吧，只需阅读我的 .vimrc （实际上是 _vimrc :-( ）来看看为什么它对我有用。
根据精湛但有点过时的 Vim 常见问题解答，一个自动命令可以帮助我：
OK, just had to read through my .vimrc (actually _vimrc :-( ) to see why it works for me.
According to the superb but slightly outdated Vim faq, an autocommand helps me: