Can you pretend to be a computer?

Try interpreting the following trivial piece of nasal code "by hand".
Then see if the nasal interpreter agrees with your interpretation.


   node = props.globals.getNode("/foo/bar", 1);
   bar = getprop("/foo/bar");
   if (bar == nil) {
     str = "bar:     nil, ";
   } else {
     str = "bar: non_nil, ";
   }
   if (bar) {
     str ~= "pass, ";
   } else {
     str ~= "fail, ";
   }
   if (node.getBoolValue()) {
     str ~= "true,  ";
   } else {
     str ~= "false, ";
   }
   print(str, node.getBoolValue(), ":", node.getValue());


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