frontend-admin / Daocheng-Yading

  var weakMemoize = function weakMemoize(func) {
    var cache = new WeakMap();
    return function (arg) {
      if (cache.has(arg)) {
        // Use non-null assertion because we just checked that the cache `has` it
        // This allows us to remove `undefined` from the return value
        return cache.get(arg);
      }
  
      var ret = func(arg);
      cache.set(arg, ret);
      return ret;
    };
  };
  
  export { weakMemoize as default };