How to use the reduce function from bluebird

Find comprehensive JavaScript bluebird.reduce code examples handpicked from public code repositorys.

bluebird.reduce is a method that applies a function to every element of an array to produce a single output value, while supporting asynchronous operations using Promises.

index.js

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const state = context.api.getState();
const deployPath = selectors.modPathsForGame(state, GAME_ID)[modType];
const deploymentManifest = await util.getManifest(context.api, modType, GAME_ID);
const gameManifestFiles = deploymentManifest.files.filter(entry =>
  path.basename(entry.relPath).toLowerCase() === MOD_MANIFEST);
return Promise.reduce(gameManifestFiles, async (accum, manifest) => {
  try {
    const modName = await getModName(path.join(deployPath, manifest.relPath), 'Name');
    accum.push({ modName, modId: manifest.source });
  } catch (err) {

+ 6 other calls in file

browserClient2.js

GitHub: TruenoDB/trueno

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};


},{}],11:[function(_dereq_,module,exports){
"use strict";
module.exports = function(Promise, INTERNAL) {
var PromiseReduce = Promise.reduce;
var PromiseAll = Promise.all;


function promiseAllThis() {
    return PromiseAll(this);

How does bluebird.reduce work?

bluebird.reduce is a method provided by the Bluebird library that iterates over a collection and applies a reduction function to each item, accumulating the result, and returning a promise of the final result. The reduction function takes two arguments: an accumulator and the current item in the collection, and returns a new accumulator value. The initial accumulator value is provided as the second argument to bluebird.reduce, after the collection. The reduction function can return a promise, in which case bluebird.reduce will wait for the promise to resolve before moving on to the next item in the collection.

bluebird.test.js

GitHub: analystsfd/apm-agent-nodejs

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test('Promise.reduce', function (t) {
  t.plan(4)
  twice(function () {
    var trans = ins.startTransaction()


    Promise.reduce([1, 2, 3], function (total, value) {
      return new Promise(function (resolve, reject) {
        setImmediate(function () {
          resolve(total + value)
        })

+ 2 other calls in file

verify.js

GitHub: musmanamjad1/AI_GPT_React

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module.exports = verify
function verify (cache, opts) {
  opts = VerifyOpts(opts)
  opts.log.silly('verify', 'verifying cache at', cache)
  return BB.reduce([
    markStartTime,
    fixPerms,
    garbageCollect,
    rebuildIndex,

Ai Example

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const Promise = require("bluebird");

// An array of numbers to sum
const numbers = [1, 2, 3, 4, 5];

// Using reduce to sum the array using promises
Promise.reduce(
  numbers,
  (total, num) => {
    return Promise.delay(100).then(() => {
      return total + num;
    });
  },
  0
)
  .then((sum) => {
    console.log(`The sum is: ${sum}`);
  })
  .catch((error) => {
    console.error(error);
  });

This example uses bluebird.reduce to sum an array of numbers asynchronously using promises. reduce is called with the numbers array as the first argument, and a function that receives the current total and the next element of the array as arguments. Inside this function, Promise.delay is used to simulate an asynchronous operation, and then the total is incremented by the next number in the array. Finally, the resulting sum is printed to the console using console.log.

Other functions in bluebird

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