Edit File: _array-reduce.js
var aFunction = require('./_a-function'); var toObject = require('./_to-object'); var IObject = require('./_iobject'); var toLength = require('./_to-length'); module.exports = function (that, callbackfn, aLen, memo, isRight) { aFunction(callbackfn); var O = toObject(that); var self = IObject(O); var length = toLength(O.length); var index = isRight ? length - 1 : 0; var i = isRight ? -1 : 1; if (aLen < 2) for (;;) { if (index in self) { memo = self[index]; index += i; break; } index += i; if (isRight ? index < 0 : length <= index) { throw TypeError('Reduce of empty array with no initial value'); } } for (;isRight ? index >= 0 : length > index; index += i) if (index in self) { memo = callbackfn(memo, self[index], index, O); } return memo; };
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