import _isArrayLike from "./_isArrayLike.js"; import _xwrap from "./_xwrap.js"; import bind from "../bind.js"; function _arrayReduce(xf, acc, list) { var idx = 0; var len = list.length; while (idx < len) { acc = xf['@@transducer/step'](acc, list[idx]); if (acc && acc['@@transducer/reduced']) { acc = acc['@@transducer/value']; break; } idx += 1; } return xf['@@transducer/result'](acc); } function _iterableReduce(xf, acc, iter) { var step = iter.next(); while (!step.done) { acc = xf['@@transducer/step'](acc, step.value); if (acc && acc['@@transducer/reduced']) { acc = acc['@@transducer/value']; break; } step = iter.next(); } return xf['@@transducer/result'](acc); } function _methodReduce(xf, acc, obj, methodName) { return xf['@@transducer/result'](obj[methodName](bind(xf['@@transducer/step'], xf), acc)); } var symIterator = typeof Symbol !== 'undefined' ? Symbol.iterator : '@@iterator'; export default function _reduce(fn, acc, list) { if (typeof fn === 'function') { fn = _xwrap(fn); } if (_isArrayLike(list)) { return _arrayReduce(fn, acc, list); } if (typeof list['fantasy-land/reduce'] === 'function') { return _methodReduce(fn, acc, list, 'fantasy-land/reduce'); } if (list[symIterator] != null) { return _iterableReduce(fn, acc, list[symIterator]()); } if (typeof list.next === 'function') { return _iterableReduce(fn, acc, list); } if (typeof list.reduce === 'function') { return _methodReduce(fn, acc, list, 'reduce'); } throw new TypeError('reduce: list must be array or iterable'); }