function runOnce(fn) {
  let hasRun = false;
  return function (...args) {
    if (!hasRun) {
      hasRun = true;
      fn(...args);
    }
  };
}

function runOnce(fn) {
  return function (...args) {
    fn(...args);
  };
}

function runOnce(fn) {
  let counter = 0;
  return function (...args) {
    if (counter < 1) {
      counter++;
      fn(...args);
    }
  };
}

function runOnce(fn) {
  return fn.bind(null, true);
}