2666/main.js


1
2
3
4
5
6
7
8
9
10
11
12

#!/usr/bin/env node
var once = function (fn) {
  var called = false;
  return function (...args) {
    if (called) {
      return undefined;
    } else {
      called = true;
      return fn(...args);
    }
  };
};