Function reduce

static/word2md/mammoth.browser.js:8370–8376

(promises, fn, initialValue, _each)

}

function reduce(promises, fn, initialValue, _each) {
    if (typeof fn !== "function") {
        return apiRejection("expecting a function but got " + util.classString(fn));
    }
    var array = new ReductionPromiseArray(promises, fn, initialValue, _each);
    return array.promise();
}

function gotAccum(accum) {
    this.accum = accum;