Js common methods

Multiple function calls allow only one execution

function once(fn) {
  let result;
  return function () {
    if (fn) {
      result = fn.apply(null.arguments);
      // eslint-disable-next-line no-param-reassign
      fn = function () {};
    }
    return result;
  };
}

let run = once((str) = > {
  console.log(str);
});

run(1);
run(2);
run(3);
run(4);
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