删除所有不包含句点的行 [英] Remove all lines which do not contain a period

问题描述

我在%userprofile%\i.txt中有这样的文字:

PDF

wikkipedia.ord
notavalidURL
snapfish.com
.tunnelbear.com
mail.google.com/mail/u/0/#inbox

我想将其转换为这样的字符串:

I want to convert it to a string like this:

wikkipedia.ord snapfish.com .tunnelbear.com mail.google.com/mail/u/0/#inbox!

我只想使用本机cmd.exe语法执行此操作(不使用powershell，cygwin等).

I want to do this using native cmd.exe syntax only (no powershell, cygwin, etc.).

所以我知道我可以做到:

So I know that I can do this:

    @echo off
    setlocal EnableDelayedExpansion
    set row=
    for /f %%x in (%userprofile%\i.txt) do set "row=!row!%%x"
    echo %row% >%userprofile%\o.txt
    echo %row%

我的结果如何忽略不包含至少一个句点字符的所有子字符串?

How can my result ignore all substrings which do not contain at least one period character?

这将删除文件的内容:

@echo off
setlocal EnableDelayedExpansion
set row=
@For /F "EOL=|Tokens=*" %%x In ('^""%__AppDir__%find.exe" "."^<"%userprofile%\i.txt"^"') Do @Set "row=!row!%%x"
echo %row% >%userprofile%\o.txt
echo %row%

其中这将连接所有行，并且在子字符串之间不留空格:

where as this will join all lines leaving no whitespaces between the sub-strings:

@echo off
setlocal EnableDelayedExpansion
set row=
@For /F "EOL=|Tokens=*" %%x In ('^""%__AppDir__%find.exe" "."^<"%userprofile%\i.txt"^"') Do @Set "row=!row!%%x"
echo %row% >%userprofile%\o.txt
echo %row%

但是我需要在所有这些子字符串之间插入空格.

but i need white-spaces between all those substring being put out.

@echo off
setlocal EnableDelayedExpansion
set row=                                         
@For /F "EOL=|Tokens=*" %%x In ('^""%__AppDir__%find.exe" "."^<"%userprofile%\i.txt"^"') Do @Set "row=!row! %%x"
echo %row% >%userprofile%\o.txt
echo %row%

这好多了，但是我在删除的字符串中留有空格.

this is a lot better but i have white-spaces left over from the strings that were removed.

我需要使用输出来分隔其余的字符串，但不要使文件带有随机的空白. 这样，我将能够将"作为StringSplit()或类似的参数传递.

i need the output to separate the remaining strings but not clutter the file with random white-spaces. this way i will be able to pass " " as a parameter for a StringSplit() or something like that.

这是代码中的'Tokens = '和取出的'Tokens = '之间的区别:

this is the difference between 'Tokens=' in the code and 'Tokens=' taken out:

推荐答案

我已经在注释中提供了足够的信息，可以帮助您纠正使用Find命令完成的原始方法.

I've already provided in the comments sufficient information for you to correct your original methodology complete with the Find command.

但是，鉴于您的示例文件内容和明确的意图，这可能足以满足您的需求:

However, given your example file content and stated intention, this may be sufficient for your needs:

@((For /F "EOL=|Delims=" %%# In ('^""%__AppDir__%find.exe" "."^<"%UserProfile%\i.txt"^"')Do @Set /P "=%%# "<NUL)&Echo()>"%UserProfile%\o.txt"

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