Using a MEAN environment, I would like to automatically shrink image files (.gif/.png/.jpg) which are uploaded by websites users, to a specific file size (e.g. 2 MB). Is there any node.js module available, enabling me to use something like this:
SomeModule.shrinkImage('MyHugeImage.jpg','2MB')
.then()
[...]
Haven't found anything suitable yet. May happen on client (using AngularJS) or server-side (Node.js module), I don't care. Suggestions?
I am trying to connect node with mysql. I have created the code for the connection and using phpmyadmin created a database called sampleDB. When I try to connect I get an Error: ER_BAD_DB_ERROR: Unknown database 'sampledb'. But I have created the database.
Here is my code
var express = require('express');
var mysql = require('mysql');
var app = express()
var connection = mysql.createConnection({
host: 'localhost',
user: 'root',
password: '',
database: 'sampleDB'
});
connection.connect(function(error){
if(!!error){
console.log(error);
} else {
console.log('Connected')
}
})
app.get('/', function(req, resp){
connection.query("Select * from mySampleTable", function(error, rows, fields){
if(!!error){
console.log('Error in query')
}else {
console.log('Success');
}
});
})
app.listen(1337);
Here is an image of of the db I created call sampleDB. 
So if I created the db called sampleDB, why am I getting an error that the sampledb table does not exist?
I am struggling with my gulp script exiting too early.
I narrowed down the problem to this:
var gulp = require("gulp");
var through = require("through2");
function Transform() {
return through.obj(function(file,enc,next) {
// not calling next(null,file)
});
}
gulp.task("test",function() {
return gulp.src("foo")
.pipe(Transform())
.pipe(gulp.dest("tmp"));
});
Running gulp test, i would expect gulp never to exit since the stream should be blocked in the Transform operation that never pass the file down. But it returns.
There is obviously something i missed. What is it ?
In node js i have a function that iterates trough an array to fill another element. Some times some proprerties are undefined, how can that be? For example i get "cannot read property formattedPrice of undefined". What is wrong with a for loop on node?
for (var i = 0; i < 10; i++) {
//console.log(JSON.stringify(item.SmallImage));
message.attachment.payload.elements[i] = {
"title":items[i].ItemAttributes.Title,
"image_url": items[i].LargeImage.URL,
"subtitle":items[i].ItemAttributes.ListPrice.FormattedPrice,
"default_action": {
"type": "web_url",
"url": "https://www.google.it",
"messenger_extensions": true,
"webview_height_ratio": "tall",
"fallback_url": "https://www.google.it"
},
"buttons":[
{
"type":"web_url",
"url":"https://www.google.it",
"title":"View Website"
},{
"type":"postback",
"title":"Start Chatting",
"payload":"DEVELOPER_DEFINED_PAYLOAD"
}
]
}
//sendMessage( senderId, {text: item.ItemAttributes.Title+" PREZZO**:"+item.ItemAttributes.ListPrice.FormattedPrice});
}
Most questions and answers on this site do not contain an easy-to follow general approach to using these two libraries together.
So, being that we use the gulp-connect npm package, and we want to make use of the gulp-watch npm package, how do we set it up so that we can:
Is there a way to generate ugly class names? I mean if there's a plugin that I could use to replace .top-header class with .a9ev in my css. Also, would be great if class name in my html was also changed
How big sites like facebook or google do this?
I am aware of the myriad of related topics to this question but none seem to answer my problem. It is related to Node and Mongo but I think this is a general Javascript issue.
In MongoDB I need to access the options array with a variable giving the index number and then increment it's votes property. An example would be:
{
"_id": {
"$oid": "58ce7c6c39aff90a7c66b0d4"
},
"question": "Test",
"options": [
{
"answer": "answer1",
"option": "Bob Dylan",
"votes": 2
},
{
"answer": "answer2",
"option": "Bob Geldof",
"votes": 0
}
]
}
I then get the index of the array I need to update like so:
var votedFor = "answer2";
votedFor = votedFor.match(/\d+/)[0];
var index = parseInt(votedFor) - 1;
Which I then assume the path to the integer to increment would be:
var inc = {};
inc["options[" + index + "].votes"] = 1;
Which I would like to pass in like so:
db.collection('questions')
.findOneAndUpdate({"_id": questionId}, {$inc : inc }, (err, result) => {
if (err) return res.send(err)
res.send(result)
})
Which updates the db like so:
{
"_id": {
"$oid": "58ce7c6c39aff90a7c66b0d4"
},
"question": "Test",
"options": [
{
"answer": "answer1",
"option": "Bob Dylan",
"votes": 2
},
{
"answer": "answer2",
"option": "Bob Geldof",
"votes": 0
}
],
"options[1]": {
"votes": 1
}
}
Which, as you can see, as opposed to incrementing options[1].votes it has created a new property instead.
Is there any way of accessing the array index with a variable like this?