async.js

问题 thanks for your help...struggling big time with how to handle this properly. I'm in async now, having given up on my ability to write the callbacks properly. I have snippet where I'm passing a set of random numbers (eachrecord) and passing them through to a mongoose call. Trying to create a data set from the multiple queries I pass. My issue is that no matter what I've done for 4 hours, the "newarray" variable is always empty. Thank you for your help - async.forEach(arLimit, function

问题 I'm kind of new to async in Node.JS and callbacks. Could you please let me know if this is the right way to have an async call? function myFunc(schema) { async.each(Object.keys(schema), function(variable) { for (item in schema[variable]) { for (field in schema[variable][item]) { // Some operations go here } createDB(item, schema[variable][item]); } }); } function CreateDB(name, new_items) { ddb.createTable(selected_field.name, {hash: ['id', ddb.schemaTypes().number], range: ['time', ddb

问题 I want to hold nodejs execution in setTimeout inside while loop. I have used async- waterfall function but it didn't work inside while loop. so I have used below code :- var i = 3; while(i> 0) { setTimeout(function(){ console.log('start', i); setTimeout(function(){ console.log('timeout');}, 1000); console.log('end', i); i--; }, 1000); } console.log("execution ends"); But I didn't get the expected output. My Expected output will be like :- start3 timeout end3 start2 timeout end2 start1 timeout

问题 I'm working on updating my project from using electron version 1.2.5 to the newest electron at this time which is 1.7.7 (atleast it was when I downloaded it). My node version 6.9.1. I've encountered a problem when I start my project with this new electron version, the error in general is about "could not locate the binding files. and it mostly regards the async module. There is also some part of the exception regarding node-etcd module which I use in my project (version 5.0.3) I found some

问题 I need to make an HTTP call and then put the response in database. i should repeat it forever. i have been reading on async module but i didn't understood how to combine these actions along with the waiting for couple of seconds between each iteration. Can someone help? Thanks in advance. 回答1: Look into async.forever. Your code would look something like this: var async = require("async"); var http = require("http"); //Delay of 5 seconds var delay = 5000; async.forever( function(next) { http

问题 I have this problem: I get a list of items from an API and I have to save them in database. For each of them I have to display some feedback, like " - item name. Saving in DB.." and after saving it show something like "Sucess! Next...". I'm using async link to iterate through the items in the array and save in DB. The problem is that the messages don't sync. It shows a bunch of the item name message and after a bunch of the success message. My code below. var saveInDB = function saveInDB(item

问题 I have an application where an article can be linked to multiple platforms . Article contains a list of platforms and platforms also contains a list of articles. For more detailed information please look at this stackoverflow question that I asked a few months ago. https://stackoverflow.com/a/40377383/5770147 The question was on how to create an article and implement the N-N relationship between article and platform. I have Creating article and Deleting the article setup so that the lists

问题 I'm trying to parse and insert a big csv file into MongoDB but when the file extends 100'000 rows I get a bad response from the server. And the files I need to insert are usually above 200'000 rows. I've tried both bulk insert (insertMany) and Babyparse(Papaparse) streaming approach to insert the file row by row. But with poor results. Node api: router.post('/csv-upload/:id', multipartMiddleware, function(req, res) { // Post vartiables var fileId = req.params.id; var csv = req.files.files

问题 In the next example I don't have access to variable "locals" inside the functions "fetcher", "parser" and "saveToDb". var parser = require('parser.js'); var fetcher = require('fetcher.js'); var saveToDb = require('models/model.js'); var async = require('async'); function task() { var locals = [] //<-- declared here async.series([ fetcher, //<-- can not access "locals" parser, //<-- can not access "locals" saveToDb //<-- can not access "locals" ], function (err) { if (err) return callback(err)

问题 I am facing a problem with Node.js (v0.12.7). I am writing an application that must be stopped somewhere and wait for a result from a query to database and then what it is doing. And the problem is not as trivial as using async (series, etc ...). I have multiple functions and modules calling each others. I tried using async but it didn't solve my problem. Concretely speaking, I have a scheme similar to this : db = require('db-utils'); exports.myFunction() { // some code ... while(condition) {