如何删除多个文件的尾随空格? [英] How to remove trailing whitespaces for multiple files?

问题描述

是否有任何工具/UNIX 单行可以删除多个文件的尾随空格就地.

Are there any tools / UNIX single liners which would remove trailing whitespaces for multiple files in-place.

例如一种可以与find结合使用的.

E.g. one that could be used in the conjunction with find.

推荐答案

你想要的

sed --in-place 's/[[:space:]]+$//' file

这将删除所有 POSIX 标准定义的空白字符，包括垂直制表符和换页符.此外，它只会在尾随空格实际存在时进行替换，这与使用零个或多个匹配器 (*) 的其他答案不同.

That will delete all POSIX standard defined whitespace characters, including vertical tab and form feed. Also, it will only do a replacement if the trailing whitespace actually exists, unlike the other answers that use the zero or more matcher (*).

--in-place 只是-i 的长形式.我更喜欢在脚本中使用长格式，因为它更能说明标志的实际作用.

--in-place is simply the long form of -i. I prefer to use the long form in scripts because it tends to be more illustrative of what the flag actually does.

它可以像这样轻松地与 find 集成:

It can be easily integrated with find like so:

find . -type f -name '*.txt' -exec sed --in-place 's/[[:space:]]+$//' {} +

如果您使用的是 Mac

正如评论中所指出的，如果您没有安装 gnu 工具，上述方法将不起作用.如果是这种情况，您可以使用以下方法:

If you're on a Mac

As pointed out in the comments, the above doesn't work if you don't have gnu tools installed. If that's the case, you can use the following:

find . -iname '*.txt' -type f -exec sed -i '' 's/[[:space:]]{1,}$//' {} +

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