Question

Is it possible to open a csv file such as:

a,b,c,d,e,f,g,h

And have DOS read it in (in a batch file), check the data and then remove it from the file under a certain condition?

Pseudo code:

open csv file
for each letter
    if letter is e
        remove e from csv file
close and save csv file

EDIT:

If I change my data source from a csv to this:

a
b
c
d
e
f
g
h

Then I can call this:

rename file.txt file.bak
        for /f %%a in (file.bak) do (
            set hmm=%%a
            if !hmm!==e set hmm=helloworld
            echo !hmm! >> file.txt)

Although this will print out the original data after the new changes like so:

a
b
c
d
helloworld
f
g
h
a
b
c
d
e
f
g
h

Answer 1

Here’s my fix:

rename file.txt file.bak
        for /f %%a in (file.bak) do (
            set hmm=%%a
            if !hmm!==e set hmm=helloworld
            echo !hmm! >> file.txt)
del file.bak

If you don’t delete the bak file it will print both the txt and bak into the new file! Weird!