Get a directory listing of only directories / folders when folders have 1000's of files

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Jeffrey Beckstead 2021-12-23

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https://ww2.mathworks.cn/matlabcentral/answers/1616565-get-a-directory-listing-of-only-directories-folders-when-folders-have-1000-s-of-files

评论： Jeffrey Beckstead 2021-12-23

Is there a way to do the DOS command "dir /A:D" and get only a listing of directories / folders below a parent? My subfolders have 10,000's of files within them. The methods given in other posts get a listing of all folders and files using "dir", and strip out the file using "isdir" field. The "ls" function on Unix can use the "ls -d" to get only the directories. Is there an equivalent on Windows?

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Answer 1

Image Analyst 2021-12-23

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https://ww2.mathworks.cn/matlabcentral/answers/1616565-get-a-directory-listing-of-only-directories-folders-when-folders-have-1000-s-of-files#answer_860825

在 MATLAB Online 中打开

You could do it in MATLAB like this:

topLevelFolder = pwd; % Wherever you want.
fileList = dir(topLevelFolder);
areFolders = [fileList.isdir];
folderList = fileList(areFolders);
numFolders = length(folderList);
% Define the min number of files to record.
minFilesInFolder = 1000;
% Find out how many files are in each one
finalFolderNameList = {};
for k = 1 : length(folderList)
    thisFolder = fullfile(folderList(k).folder, folderList(k).name);
    filePattern = fullfile(thisFolder, '*.*');
    files = dir(filePattern);
    numFiles = length(files);
    fprintf('"%s" has %d files in it.\n', thisFolder, numFiles);
    % If it has the min number of files in it, save this folder name in our final list.
    if numFiles >= minFilesInFolder
        % Store this folder in the final list.
        finalFolderNameList = [finalFolderNameList; thisFolder];
    end
end

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Jeffrey Beckstead 2021-12-23

Great. After submitting question, I thought more on what I might want. Your method allows me to add in the additional needs that would have come after getting the initial listing. You are a much faster typer/coder than I to develope that sample code in that time. Thank you

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