async.js

How to execute functions in parallel with async.js?

由 可紊 提交于 2019-11-28 14:37:32
In the following code, I have Array.forEach , It executes the doSomething synchronous function in sequence: items.forEach(function(item) { doSomething(item); }); I need to execute functions ( doSomething ) in parallel, use async.js and try the following: async.each(items, function (item, doneCallback) { var startDate = new Date(); console.log(item.name().toString() + ' startDate: ' + startDate.toString() + ' - ' + startDate.getMilliseconds().toString()); doSomething(item); //Lazy function for many operations. var endDate = new Date(); console.log(item.name().toString() + ' endDate' + endDate

Using async.js for deep populating sails.js

由 梦想的初衷 提交于 2019-11-28 11:45:19
问题 I have a big issue with my function in sails.js (v12). I'm trying to get all userDetail using async (v2.3) for deep populating my user info: UserController.js: userDetail: function (req, res) { var currentUserID = authToken.getUserIDFromToken(req); async.auto({ //Find the User user: function (cb) { User .findOne({ id: req.params.id }) .populate('userFollowing') .populate('userFollower') .populate('trips', { sort: 'createdAt DESC' }) .exec(function (err, foundedUser) { if (err) { return res

Async.js - Is parallel really parallel?

由 ≡放荡痞女 提交于 2019-11-28 09:50:16
As I have understood so far: Javascript is single threaded. If you defer the execution of some procedure, you just schedule it (queue it) to be run next time the thread is free. But Async.js defines two methods: Async::parallel & Async::parallelLimit , and I quote: parallel(tasks, [callback]) Run an array of functions in parallel, without waiting until the previous function has completed. If any of the functions pass an error to its callback... parallelLimit(tasks, limit, [callback]) The same as parallel only the tasks are executed in parallel with a maximum of "limit" tasks executing at any

Is a call to Node.js' async.parallel() synchronous?

由 纵饮孤独 提交于 2019-11-28 06:19:04
问题 I am taking a look at Node.js' async module to solve an issue. I have implemented a little test: var async = require("async"); function print(val) { console.log(val); } async.parallel([ function(cb){ print(1); cb(null); }, function(cb){ print(2); cb(null); }, function(cb){ print(3); cb(null); }, function(cb){ print(4); cb(null); }, function(cb){ print(5); cb(null); } ], function(err) { if ( err ) { console.error(err); return; } console.log("Done!"); } ); console.log("Trulu"); Can I be sure

async.each not iterating when using promises

由 霸气de小男生 提交于 2019-11-27 08:51:23
问题 I am trying to run an asynchronous loop async.each over an array of objects. On each object in the array, I am trying to run two functions sequentially (using promises ). The problem is that async.each only runs for the first keyword. In the following code, getKeywords loads some keywords from a file, then returns an array of keyword objects. Each keyword object is put into searchKeyword that makes a search. The search result is then put into a database using InsertSearchResults . In my mind,

How to execute functions in parallel with async.js?

由 自作多情 提交于 2019-11-27 08:43:23
问题 In the following code, I have Array.forEach , It executes the doSomething synchronous function in sequence: items.forEach(function(item) { doSomething(item); }); I need to execute functions ( doSomething ) in parallel, use async.js and try the following: async.each(items, function (item, doneCallback) { var startDate = new Date(); console.log(item.name().toString() + ' startDate: ' + startDate.toString() + ' - ' + startDate.getMilliseconds().toString()); doSomething(item); //Lazy function for

Async.js - Is parallel really parallel?

由 萝らか妹 提交于 2019-11-27 03:14:23
问题 As I have understood so far: Javascript is single threaded. If you defer the execution of some procedure, you just schedule it (queue it) to be run next time the thread is free. But Async.js defines two methods: Async::parallel & Async::parallelLimit , and I quote: parallel(tasks, [callback]) Run an array of functions in parallel, without waiting until the previous function has completed. If any of the functions pass an error to its callback... parallelLimit(tasks, limit, [callback]) The same
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