CODEWITHSUNDEEP
batch-filefor-looppipeline
I am a Terrible Programmer
I am a Terrible Programmer

Reputation: 480

Why is this pipe not working inside a for loop

When I run the code, it outputs FIND: Parameter format not correct and The process tried to write to a nonexistent pipe.. From this, I'm pretty sure the for loop can't handle the pipe and/or redirection. I'm not sure what to do from here, I've tried running it outside a loop, and that works fine, but inside the loop it chucks the dummy. Does anyone know why, or how I can fix this?

@ECHO OFF

setlocal enabledelayedexpansion
for /F "tokens=*" %%a in (set_1.txt) do (
    type set_2.txt | find %%a > nul
    if !errorlevel! EQU 1 (
        echo %%a
    )
) 

endlocal
pause

And before anyone says it, I'm aware this is not the most efficient method for finding strings in files, but it doesn't matter for the file sizes I'm dealing with.

Upvotes: 1

Views: 1459

Answers (1)

jeb
jeb

Reputation: 82418

type someFile | find word simply fails, as find requires a "word" in quotes.

So the solution is to change your line to

type set_2.txt | find "%%a" > nul
if !errorlevel! EQU 0 (
     ....

Or even simpler

type set_2.txt | find "%%a" > nul || echo %%a not found

Upvotes: 4

Related Questions