Vim - 仅在某些行上执行替换 [英] Vim - Performing substitution on certain lines only

问题描述

我在寻求仅对偶数行执行替换的过程中发现以下内容:

I have found the following in my quest to perform a substitution on even numbered lines only:

:g/^/if !(line('.')%2)|s/foo/bar/g|endif 

效果很好.但是有人可以解释一下对 | 的需要吗?:g 调用的命令部分中的字符?

Works great. But can someone please explain the need for the | characters in the command section of the :g call?

推荐答案

| 字符是命令分隔符；使用它，您可以在一行中连接多个 Ex 命令，而无需添加换行符.请参阅 :help :bar.

The | character is the command separator; with it, you can concatenate multiple Ex commands in a single line, without adding newlines. See :help :bar.

因此，您的条件等效于以下内容:

So, your conditional is equivalent to the following:

if !(line('.')%2)
    s/foo/bar/g
endif

请注意，一些 Ex 命令占用了命令行的全部剩余部分，因此不能直接与 | 连接.但是您可以将这些命令包装在 :execute "{cmd}" 中.

Note that some Ex commands consume the entire remainder of the command-line and therefore cannot be directly concatenated with |. But you can wrap those commands in :execute "{cmd}".

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