connect

the slot don't work for QListWidget itemClicked (pyqt)

纵然是瞬间 提交于 2019-12-02 21:04:52
问题 I create a QListWidget, and I want to connect the itemClicked with my slot. And the following code is OK: when I click the item, the listwidgetclicked has been called from PyQt5.QtWidgets import * from PyQt5.QtCore import * import sys class MainWindow(QMainWindow): def __init__(self, parent=None): super(MainWindow, self).__init__(parent) self.imagelabel = QLabel() layout = QVBoxLayout() self.imagelabel.setLayout(layout) self.setCentralWidget(self.imagelabel) label1 = QLabel('hello, world')

Node.js - Express 4.x - method-override not handling PUT request

橙三吉。 提交于 2019-12-02 20:43:38
I am attempting to have the server handle a PUT request. But to no avail. The client keeps receiving "Cannot POST /" message after submitting the form. I am using Express 4.x. Note that if I change "put" to "post" in my route, the request gets handled just fine... How can I have my server handle the 'PUT' request? SERVER: var express = require("express"); var bodyParser = require("body-parser"); var methodOverride = require("method-override"); var app = express(); app.use(bodyParser()); app.use(methodOverride()); app.get("/",function(req,res){ res.render("index.ejs"); console.log("GET received

What properties does Node.js express's Error object expose?

一世执手 提交于 2019-12-02 20:01:04
I would like to know what are the functions the Error object of nodejs express exposes for use in Error Handling? A console.log of an error call new Error('NotFound') is showing only [Error: NotFound] , is this because .toString() method is overriden? How do find the properties and functions exposed by these objects? The Error object is actually a native object provided by V8 , rather than by node.js or express . The property that will most likely be of the most use to you is stack . E.g., console.log(new Error('NotFound').stack); There are other properties available as well, such as name and

Connect-mongo sessions not being deleted automatically

℡╲_俬逩灬. 提交于 2019-12-02 19:38:58
I have an application using NodeJS, Express, MongoDB and connect-mongo. My issue is that sessions don’t seem to be automatically deleted from MongoDB when they expire, so the db size grows until the disk is full. The developer of connect-mongo wrote a comment : connect-mongo will ask MongoDB to remove all the sessions that have expired before the current date. But this doesn’t seem to be happening in my case. My configuration is: var express = require('express'); var MongoStore = require('connect-mongo'); var sessionStore = new MongoStore({db: 'myappsession'}); var app = express.createServer()

QObject::connect: No such slot (Qt, C++)

徘徊边缘 提交于 2019-12-02 17:14:37
问题 I can run the program but the button cannot access the send function. I get this hint: QObject::connect: No such slot Mail::send(emailInput, pwdInput) Someone knows what's my mistake? mail.h: #ifndef MAIL_H #define MAIL_H #include <QWidget> namespace Ui { class Mail; } class Mail : public QWidget { Q_OBJECT public: explicit Mail(QWidget *parent = 0); ~Mail(); public slots: void send(std::string email, std::string pwd); private: Ui::Mail *ui; }; #endif // MAIL_H mail.cpp: Mail::Mail(QWidget

Check each node.js request for authentication credentials

一笑奈何 提交于 2019-12-02 16:17:55
I'm using node.js with Express and connect-auth to authenticate users. This is the verification when requesting /index: if(req.isAuthenticated()) { res.redirect('/dashboard'); } else { res.render('index', { layout: 'nonav' }); } However, after logging out and going back to f.e. '/dashboard', I can see the dashboard. How can I put the authentication check to every request to make sure there's a valid user at all times? Update I don't have any problems with the authentication, everything works fine! I need a solution which checks every route/request if there's a valid user, without putting a

How to connect with Wifi Camera ios

為{幸葍}努か 提交于 2019-12-02 12:56:14
问题 I need some help, in my project i need to get images captured by wifi camera . I need to connect with that camera with IPAddress and get those images. I am completely new to this topic, so please suggest me that 1) How to connect with wifi cameras using IPAddress 2) How to get captured pictures automatically Thanks in advance... 回答1: In iOS you can't connect the WIFI network from your application. Apple has not grant permission to access the WIFI setting inside the other app. You only get the

Agri-Net POJ - 1258 最小生成树值Prim算法

拥有回忆 提交于 2019-12-02 12:12:17
Farmer John has been elected mayor of his town! One of his campaign promises was to bring internet connectivity to all farms in the area. He needs your help, of course. Farmer John ordered a high speed connection for his farm and is going to share his connectivity with the other farmers. To minimize cost, he wants to lay the minimum amount of optical fiber to connect his farm to all the other farms. Given a list of how much fiber it takes to connect each pair of farms, you must find the minimum amount of fiber needed to connect them all together. Each farm must connect to some other farm such

make line that connects two objects in silverlight

a 夏天 提交于 2019-12-02 11:09:15
how can I connect these entity boxes? the boxes are created by clicking a button and they can be dragged. Now I want to connect them with a line or something. Here is a quick and dirty implementation: the class that represents the connection: public partial class Connection { public MyBox Box1 { get; set; } public MyBox Box2 { get; set; } public Line Line { get; set; } } To create a new connection I've used a basic form: name of source, destination and a button: <StackPanel Orientation="Horizontal" Grid.Row="3"> <TextBox Width="100" Text="{Binding From,UpdateSourceTrigger=PropertyChanged,Mode

Node.js Connect createServer code

。_饼干妹妹 提交于 2019-12-02 10:33:06
I'm reading Node.js Connect version 2.15.0: /** * Create a new connect server. * * @return {Function} * @api public */ function createServer() { function app(req, res, next){ app.handle(req, res, next); } utils.merge(app, proto); utils.merge(app, EventEmitter.prototype); app.route = '/'; app.stack = []; for (var i = 0; i < arguments.length; ++i) { app.use(arguments[i]); } return app; }; A few questions: app.handle seems to be provided in proto, since there is app.handle defined in proto.js. So, this is a use of a closure, and app.handle is defined not at the time Node parses function app() but