Data commit

Task/Execute-a-system-command/D/execute-a-system-command.d

@@ -0,0 +1,9 @@
+import std.process, std.stdio;
+//these two alternatives wait for the process to return, and capture the output
+//each process function returns a Tuple of (int)"status" and (string)"output
+auto ls_string = executeShell("ls -l"); //takes single string
+writeln((ls_string.status == 0) ? ls_string.output : "command failed");
+
+auto ls_array = execute(["ls", "-l"]); //takes array of strings
+writeln((ls_array.status == 0) ? ls_array.output : "command failed");
+//other alternatives exist to spawn processes in parallel and capture output via pipes