"use strict"; var _slicedToArray = function (arr, i) { if (Array.isArray(arr)) { return arr; } else { var _arr = []; for (var _iterator = arr[Symbol.iterator](), _step; !(_step = _iterator.next()).done;) { _arr.push(_step.value); if (i && _arr.length === i) break; } return _arr; } }; var _ref = f(); var _ref2 = _slicedToArray(_ref, 2); a = _ref2[0]; b = _ref2[1];