Initial data commit

Task/Find-common-directory-path/D/find-common-directory-path.d

@@ -0,0 +1,14 @@
+import std.stdio, std.string, std.algorithm, std.path, std.array;
+
+string commonDirPath(in string[] paths, in string sep = "/") pure {
+    if (paths.empty)
+        return null;
+    return paths.map!(p => p.split(sep)).reduce!commonPrefix.join(sep);
+}
+
+void main() {
+    immutable paths = ["/home/user1/tmp/coverage/test",
+                       "/home/user1/tmp/covert/operator",
+                       "/home/user1/tmp/coven/members"];
+    writeln(`The common path is: "`, paths.commonDirPath, '"');
+}