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Process each file in a directory
for (File file : (new File("c:\\")).listFiles()) process(file);
foreach (string filename in System.IO.Directory.GetFiles(directory)) ProcessFile(filename);
; (defn process-file [f] "process one file" body...)
(map process-file (.listFiles (File. ".")))
(map process-file (.listFiles (File. ".")))
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