@v4fire/core/lib/core/prelude/function/memoize/index.js

V4Fire core library

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
var _extend = _interopRequireDefault(require("../../../../core/prelude/extend"));
(0, _extend.default)(Function.prototype, 'once', function once() {
  const fn = this;
  let called = false,
    res;
  return function wrapper(...args) {
    if (called) {
      return res;
    }
    res = fn.apply(this, args);
    called = true;
    return res;
  };
});
(0, _extend.default)(Function, 'once', fn => fn.once());