node.js

问题 Basically I am practicing NodeJs/MongoDB by making a simple blog app. I am using the .find() method to final all the saved blogs on the db , and then running it through a loop to post it on the main page. That method is called every time the page is refreshed, so how do I stop it from being called to avoid automatic reposts? exports.getBlogEntries = function() { Entry.find(function(err, entries) { if (!err){ for(i = 1; i < entries.length; i++ ) { list.push(entries[i]); } } }); return list; };

问题 I wanted to increment a number to a filename if the filename already exists in the database (based on the records too). for example if I add file with filename DOC it will check if DOC exist since DOC exist on the example below and the latest increment is 1 (DOC-1) then the filename would be DOC-2. If I add DOC again and the latest increment is 2 so the new filename would be DOC-3.so on and so forth. Any idea guys ? thank you. Sounds like what I want is to always create a new filename (by

问题 I came accross a problem while using SockJS on a specific access network. It think it is related to the way SockJS chooses the best transport protocol (websocket, long polling, ...) according to the state of the network. Using a web browser, my SockJS client is connected with the websocket transport protocol to my node SockJS server. I even see the "on connection" event on node. However, when I send data, nothing passes through it. To be exhaustive, it works perfectly well from some other

问题 I am using stitch in mongodb. In stitch, i write one nodejs function for increment and decrements purpose. if(changeEvent.fullDocument.type == 'article' || changeEvent.fullDocument.type == 'poll' ) { context.functions.execute("notifyTopic", "article-created", changeEvent.fullDocument); var communities = context.services.get("mongodb-atlas").db("utilo").collection("communities"); communities.updateOne( {_id:changeEvent.fullDocument.community}, {$inc: {"summary.postCount":NumberInt(1)},

问题 I am using stitch in mongodb. In stitch, i write one nodejs function for increment and decrements purpose. if(changeEvent.fullDocument.type == 'article' || changeEvent.fullDocument.type == 'poll' ) { context.functions.execute("notifyTopic", "article-created", changeEvent.fullDocument); var communities = context.services.get("mongodb-atlas").db("utilo").collection("communities"); communities.updateOne( {_id:changeEvent.fullDocument.community}, {$inc: {"summary.postCount":NumberInt(1)},

问题 I am using body-parser to get info requested from forms, but when I put enctype="multipart/form-data" in the header of the form, the req.body will not working at all. However, I have used multer lib in order to upload images as follow: app.post("/", function (req, res, next) { var button = req.body.button_name; if (button == "upload") { var UserId = 2; var imageUploadedLimited = 3; var storage = multer.diskStorage({ destination: function (req, file, callback) { var dir = "./public/images

问题 npm ERR! Unexpected end of JSON input while parsing near '...pes/node":"^12.6.9","' npm ERR! A complete log of this run can be found in: npm ERR! C:\Users\Dubey\AppData\Roaming\npm-cache_logs\2020-05-30T08_45_02_091Z-debug.log Please help me to get over this error. 回答1: try this npm cache clean --force 回答2: " Unexpected end of JSON input while parsing near " happens when you have a syntactically wrong package.json . Try to copy paste your package.json file ( all the file ) here. This tool

问题 Got very strange issues. Basically i decided create my own npm package, and publish it to the world. During development, I was testing it as s simple node module, and was able to use it using next code: var r = require('./lib/%mymodulename%'); Of course it was in the lib folder. Now, I organised it as a npm package, and my package.json looks next: { "name": "mymodulename", "author": "xxx", "description": "xxx", "version": "0.0.1", "homepage": "xxx", "repository": { "type": "git", "url": "xxx"

问题 I am trying to get tensorflow working in my electron app using tensorflow js. Here are the details of the various versions: Nodejs: v14.4.0 @tensorflow/tfjs - 2.0.0 @tensorflow/tfjs-node - 2.0.0 electron - 1.8.8 When I try to load the tfjs module using: const tf = require('@tensorflow/tfjs'); I get the following error: I have looked everywhere but can't seem to find anything relevant for this error. Any help would be much appreciated. 回答1: SOLUTION The issue seems to be one of competing

问题 Is there a Node.js module that handles AES-CMAC (RFC 4493)? I've been searching around NPM, Google, and the like, but haven't found one. Somebody within my company built one that wraps Crypto++ as a C++ addon for Node.js, but unfortunately it doesn't build on Windows (depends on make ). Just looking for possible alternatives. This is similar to this other question, but I'm hoping for a Node.js specific implementation instead of a plain JavaScript one. Ideally something that makes use of Node