[英]Remove certain extensions from filename with multiple extensions
我可以使用fileparts
獲取不帶擴展名的文件名
>> f = '/foo/bar/file.gz'
>> [~,filename,~] = fileparts(f)
filename =
'file'
但是,如果文件有多個擴展名,則只會刪除最后一個
>>f = '/foo/bar/file.gz.tar'
>>[~,filename,~] = fileparts(f)
filename =
'file.gz'
我知道文件擴展名可能帶有多個點是模棱兩可的,但是有沒有一種方法可以指定,例如,應該刪除.gz
和.gz.tar
?
您始終可以手動搜索點:
[~,filename,~] = fileparts(f);
i = find(filename == '.', 1, 'first');
if ~isempty(i)
filename = filename(1:i - 1);
end
或者您可以迭代fileparts
,直到它停止更改名稱:
[~, filename, ~] = fileparts(f);
prev = '';
while ~strcmp(prev, filename)
prev = filename;
[~, filename, ~] = fileparts(prev);
end
如果您要刪除確切的擴展名,則要簡單得多。 只需檢查名稱是否以該序列結尾,並根據需要刪除盡可能多的字符。 對於.tar.gz
示例:
ext = '.tar.gz';
n = numel(ext);
if numel(f) >= n && all(f(end - n + 1:end) == ext)
f = f(1:end - n);
end
[~, filename, ext] = fileparts(f);
filename = [filename ext];
這將刪除所有擴展:
f = '/foo/bar/file.gz.tar';
path = fileparts(f); % get folder path
fileWithExt = erase(f,[path '/']); % erase folder path from full path
fparts = strsplit(fileWithExt,'.'); % split string at dot
file = fparts{1}; % get first entry
這只會刪除選擇的擴展:
f = '/foo/bar/file.gz.tar.abc.xyz';
exts = {'tar','xyz'}; % extensions to remove
path = fileparts(f); % get folder path
fileWithExt = erase(f,[path '/']); % erase folder path from full path
fparts = strsplit(fileWithExt,'.'); % split string at dot
mask = ismember(fparts,exts); % mask of extensions to remove
file = strjoin(fparts(~mask),'.'); % stitch string back together
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