# File lib/zip/zip_file.rb, line 279 def mkdir(entryName, permissionInt = 0755) if find_entry(entryName) raise Errno::EEXIST, "File exists - #{entryName}" end entryName = entryName.dup.to_s entryName << '/' unless entryName.end_with?('/') @entrySet << ZipStreamableDirectory.new(@name, entryName, nil, permissionInt) end