javascript - NodeJS async library parallel method strange behavior -

javascript - NodeJS async library parallel method strange behavior -

i'm attempting utilize async module nodejs first time, , i'm running problem when seek , dynamically build array of functions async.parallel function run:

methods = []; (key in entries) { methods.push(function(callback) { homecoming callback(null, key); }); } homecoming async.parallel(methods, function(err, results) { console.log(results); homecoming render_views(req, res, 'view_blog_all', { entries: entries }); });

the output maintain seeing is:

[ 'powerful_sms_communication_for_teams', 'powerful_sms_communication_for_teams', 'powerful_sms_communication_for_teams' ]

and 'entries' object i'm looping on has 3 different keys. i'm missing?

async module: https://github.com/caolan/async

this mutual problem people run asynchronous logic. key remember callback not run until phone call async.parallel, , @ point, key lastly key value in loop.

one way solve capture key value within new scope using iife.

methods = []; (key in entries) { (function(key){ methods.push(function(callback) { homecoming callback(null, key); }); })(key); }

you can utilize async.map normal array , single iterator instead.

return async.map( entries, function(key, callback){ callback(null, key); }, function(err, results) { console.log(results); homecoming render_views(req, res, 'view_blog_all', { entries: entries }); } );

javascript node.js scope