Initial data commit

Task/File-size/D/file-size.d

@@ -0,0 +1,22 @@
+import std.file, std.stdio, std.path, std.file, std.stream,
+       std.mmfile;
+
+void main() {
+    immutable fileName = "file_size.exe";
+
+    try {
+        writefln("File '%s' has size:", fileName);
+
+        writefln("%10d bytes by std.file.getSize (function)",
+                 std.file.getSize(fileName));
+
+        writefln("%10d bytes by std.stream (class)",
+                 new std.stream.File(fileName).size);
+
+        // mmfile can treat the file as an array in memory.
+        writefln("%10d bytes by std.mmfile (class)",
+                 new std.mmfile.MmFile(fileName).length);
+    } catch (Exception e) {
+        e.msg.writefln;
+    }
+}