This is the way I create modules: myModule.js var MyObject = function() { // This is private because it is not being return var _privateFunction = function(param1, param2) { … return; } var function1 = function(param1, callback) { … callback(err, results); } var function2 = function(param1, param2, callback) { … callback(err, results); } return { … Read more
There are a few npm packages such as better-sqlite3 and sqlite-sync that allow for synchronous SQLite queries. Here’s an example: var sqlite = require(“better-sqlite3”); var db = new sqlite(“example.db”); var rows = db.prepare(“SELECT * FROM probes”).all(); console.log(rows);
A recommended first step is to use the latest npm: npm install -g npm (You may need sudo). You are using npm 2.x, the latest is 3.5.x.
The API for promises requires you to pass a function to the promise constructor. Quoting MDN: new Promise( /* executor */ function(resolve, reject) { … } ); executor – A function that is passed with the arguments resolve and reject. The executor function is executed immediately by the Promise implementation, passing resolve and reject functions … Read more
You do not need to use express, Next JS already has its own built-in server. However since express is popular, it is easier for developers to communicate with databases or handle other backend work.
Your require statement may be incorrect, make sure you have the following var fs = require(“fs”); fs.exists(“/path/to/file”,function(exists){ // handle result }); Read the documentation here http://nodejs.org/api/fs.html#fs_fs_exists_path_callback
The error comes from the bcrypt.hash method. In your case, you have the following piece of code : bcrypt.hash(newUser.password, salt , (err, hash) => { … } I think that your problem comes from the newUser.password that must be empty (null or undefined). The error says data and salt arguments required. It looks like your … Read more
The results returned from the aggregation pipeline are just plain objects. So you do the sorting as a pipeline stage, not as a separate operation: Recommend.aggregate( [ // Grouping pipeline { “$group”: { “_id”: ‘$roomId’, “recommendCount”: { “$sum”: 1 } }}, // Sorting pipeline { “$sort”: { “recommendCount”: -1 } }, // Optionally limit results … Read more