JavaScript multiple object instances, cannot correctly access properties inside event handler

I have a working version of HTML5 drag & drop file uploader. I was editing the JS code to support multiple file uploads on same page. I came across with a problem by trying to access "instance"...

using regex in mysql based on middle of string value

I have a system that uses personalized URLs (i.e. JohnSmith.MyWebsite.com). In my database, these values are stored in the "purl" column. If six months from now, I get another john smith I need...

How to extract R code from a Markdown file (*.md)?

I tried the following R commands in order to generate an R file: library(knitr) purl("/Readme.md") But I get an R empty file.

HTTP 400 Bad Request - CORS enabled WCF Service

I am trying to use CORS on WCF for cross domain calls to the service. I have most of the things working, but when I try to call the function it always gives me a error -HTTP 400 Bad Request I used...

PHP session variable being reset in Android application

I am using a session variable in a php script that I am using in an Android application to store some information about a user. This implementation works when I run the php script in my terminal....

testthat fails within devtools::check but works in devtools::test

Is there any way to reproduce the environment which is used by devtools::check? I have the problem that my tests work with devtools::test() but fail within devtools::check(). My problem is now,...

Getting 'Attempt to invoke virtual method 'java.lang.String java.lang.String.trim()' on a null object reference' even when the reference is not null

I'm using FirebaseUI in my app and FirebaseRecyclerAdapter to be more specific. I'm fetching data from my FirebaseDatabase reference using the method given here. Here's my code: private void...

How to store the URL's and Titles of a list of posts under same label into a String array in Blogger

The question I have is, how to store the URL's and Titles of the posts under the one and the same label into a String array. Suppose I have a number of posts under the label Action URL And...

HQL join query: Path expected for join

I'm new to hql, I referred to a site to write hql query in Spring Framework, but it throws "Path expected for join!" exception My query is "from GaugeCateSelect cs inner join PreferredUrl purl on...

Spring Boot application + Jolokia - exception during startup

I'm using Spring Boot 1.5.3.RELEASE and Jolokia 1.3.6 (also happens in later versions). The Jolokia is integrated by adding a dependency: <dependency> <groupId>org.jolokia</groupId> ...

CORS issue with localhost and put method

I'm trying to make a CORS requests to communicate between my client and server placed in two different domain. The server headers has been set to the following...

How to send an image with JDA

im developing my Java bot for discord. And I want to send an image. I tried using TextChannel.sendFile(File, Message), but it`s not that result that I want to get. I want this file to be displayed...

libevent multithreaded http server: can't reply evhttp_request successfully in sub threads

The problem is: client can't recv http response replied with "evhttp_send_reply" in sub thread in server side. I've tried the model to setup multithreaded http server with libevent evhttp, below...

Google script to find if a Cell is blank - isBlank function doesn't work

Here is my code. I'm trying to execute the code only if the cell is not blank. As we do not have a inbuilt function for isBlank i though of using it to fill the empty cell with predefined value....

Run selected chunks from one Rmd in another

I've run my analyses in a source Rmd file and would like to knit a clean version from a final Rmd file using only a few of the chunks from the source. I've seen a few answers with regard to...

Parsing multiple xml files in folder then write to central csv

I'm new to python and have written the following code to parse multiple xml files in a directory and write the content to a central CSV file. I have a folder with approximately 30 xml files. My...

How Do I Use Objective-C (ObjC) with JavaScript for Automation (JXA) to create HTTP request?

I created a simple http request in the following way: source: Getting HTML Source from a URL without a Web Browser var urlStr = "https://stackoverflow.com/"; var htmlStr =...

Cannot get web PDFs to view in Ionic 4 on Android devices

I have an Ionic 4 app developed using InAppBrowser. The app is, in fact, almost all purely done via InAppBrowser: Splash Screen > URL passed to InAppBrowser > Site loads. User logins in, clicks...

JavaFX Button Increment and Decrement Event Not Working Correctly

I'm working on a knitting application that counts rows and displays a row in a pattern. The issue that I am currently having with it is with the counter and how it loops through the numbers. I...

Electron - is there a way to spawn a node child process without node on the production computer?

In Electron, I'm trying to get files that would normally have a file:// url origin to be served instead from localhost. In order to do this I've set up an internal http server in the electron app...

Dotnetcore 3.1 middleware HttpContext.Request is already null before middleware runs during in-memory TestServer integration test

I have a dotnetcore 3.1 API project that receives HTTP requests, passes pertinent data to a service layer, which then does business logic and writes the data to the database. Pretty standard...

R knitr's Build Code Appendix not working

I am trying to build a code appendix using the instructions from Yihui's site below: https://bookdown.org/yihui/rmarkdown-cookbook/code-appendix.html The issues is that I get no results, nothing...

Memory leak, misuse of thread?

Im trying to use the threads for the first time, but cant tell why am i getting memory leak, cause of misuse of the thread, or cause im that stupid and forgot to free something, but at this point,...

React router dom white screen after a few navigations

I am working on a ReactJS project. Here I am facing an issue with react-router-dom. After a few navigations, my screen whites out. Following is my Router.js file: // Routes.js import React from...

How to solve Easy Paisa (Easy Pay) Payment Gate Integration Error Invalid Authentication Token

In my project I am trying to integrate Easy payment gateway but I am receiving INVALID AUTHENTICATION TOKEN in my WebView. E/purl: https://easypaystg.easypaisa.com.pk/easypay/Index.jsf E/token:...

Receiving and internal server error 500 when making a post request from a google cloud function

I actually found this exact question on the site previously, however the solution for their problem did not solve mine. Below is my code for my google cloud function: exports.makeOrder =...

Youtube-dl on Ubuntu 16.04 not embedding thumbnail to mp3 but creates the mp3 while using bash script

Ubuntu 16.04 Bash 4.4.0 Here is my /etc/youtube-dl.conf --force-ipv4 --ignore-errors --prefer-ffmpeg --no-mtime --add-metadata --write-all-thumbnails --extract-audio --format...

What is @types/node package in NodeJs?

I'm using Node v10 and I found that I have dependency issue when using a library. In the ldapjs library, lib\url.js uses const url = require('url') and then parsedURL = new url.URL(urlStr) to...

Building wheel for cffi (setup.py) ... error while installing the packages from requirements.txt in django

I am trying to install a new Django project from git, I created a new virtual envt using python3(version: 3.8.5). When I try to install the required libraries in the requirements.txt, I get the...

Building my unaltered package suddenly fails: for Vignettes and 'arch = x64'

Context I've been developing a proprietary package (call it "my_pkg") with vignettes, in RStudio with the latest version (4.1.1) of R. I'm working on a Lenovo ThinkPad with the following...