管道查找findstr的输入 [英] Piping to findstr's input

问题描述

我有一个文本文件，其中列出了宏名称(每行一个).我的最终目标是打印出宏名称在当前目录的文件中出现多少次.

I have a text file with a list of macro names (one per line). My final goal is to get a print of how many times the macro's name appears in the files of the current directory.

宏的名称在C:\temp\macros.txt中.

type C:\temp\macros.txt可以正确打印列表.

现在，我想将输出输出到findstr的标准输入.

Now I want to pipe that output to the standard input of findstr.

type C:\temp\macros.txt | findstr *.ss (ss是我要在其中查找宏名称的文件类型).

type C:\temp\macros.txt | findstr *.ss (ss is the file type where I am looking for the macro names).

这似乎不起作用，我没有任何结果(非常快，它似乎根本没有尝试). findstr <the first row of the macro list> *.ss确实有效.

This does not seem to work, I get no result (very fast, it does not seem to try at all). findstr <the first row of the macro list> *.ss does work.

我也尝试了findstr *.ss < c:\temp\macros.txt，但没有成功.

I also tried findstr *.ss < c:\temp\macros.txt with no success.

推荐答案

我认为您对findstr的工作方式有些困惑.它从文件名(模式)或从stdin获取输入(在其中查找内容-而不是要查找的内容)，但是您一直在命令行上输入 来查找所需的内容作为findstr的参数.

I think you're confusing a little how findstr works. It gets input (to find things in – not the things to look for) either as a file name (pattern) or from stdin, but the things you're looking for are always given on the command line as an argument to findstr.

findstr foo xyz.txt

在文件xyz.txt中找到字符串foo.

type meh.txt | findstr x

在上一条命令的输出中找到字符串x(在这种情况下，文件meh.txt的内容–浪费了type命令，与常见的cat误用类似).

finds the string x in the output of the previous command (in this case the contents of the file meh.txt – a nice waste of the type command, much akin to common misuse of cat).

由于您追求的是 counts 而不是宏名称出现的实际行，因此我建议采用另一种方法.假设您的包含宏的文件每行列出一个宏:

Since you're after the counts instead of the actual lines the macro names appear in, I'd suggest a different approach. This assumes that your file containing the macros lists them one per line:

for /f "delims=" %x in (macros.txt) do @(echo %x: & find /c "%x" *.ss)

for循环逐行遍历文件的内容.然后，它会继续打印您要搜索的名称，并执行find /c，它实际上会计算匹配的行数.

The for loop iterates over the contents of your file, line-wise. It then proceeds to print the name you're searching for and executing find /c which actually counts matching lines.

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