Improving runWithDebugger

gistfile1.txt

function runWithDebugger(callback, arg1) {
  if (Array.isArray(arg1)) {
   debugger;
   return callback.apply(null, arg1);
  } else {
    debugger;
    return callback(arg1);
  }
};

function sayFullName(lastName, firstName, middleName) {
  if (!middleName) {
    return ('hi ' + firstName + ' ' + lastName);
  } else {
    return ('hi ' + firstName + ' ' + middleName + ' ' + lastName);
  }
};

var args1 = ['zhu', 'gordon'];
runWithDebugger(sayFullName, args1)