I think I'm missing something because I can't seem to find what this means.
Example:
for /D %%A in (*) do "\7za.exe" u -t7z -m9=LZMA2 "%%A.7z" "%%A"
That line was supposed to use a command line version of 7zip
to compress individual folders, but I'm stumped as to what %%A
means in this context.
Best Answer
The
for
command needs a placeholder so you can pass along variables for use later in the query, we are telling it use the placeholder%A
, the reason the code you saw uses%%A
is because inside a batch file (which I assume is where you found this) the%
has a special meaning, so you must do it twice%%
so it gets turned in to a single%
to be passed to thefor
commandTo actually break apart what the command is doing, there is two parts to the command:
What this part says is for every folder in the current folder execute the following command replacing
%%A
with the name of the currently processing folder.What this part says is execute the command
"\7za.exe" u -t7z -m9=LZMA2 "%%A.7z" "%%A"
and replace the two%%A
's with the current record we are processing.