mmap() vs. reading blocks

I'm working on a program that will be processing files that could potentially be 100GB or more in size. The files contain sets of variable length records. I've got a first implementation up and...

An integer is required? open()

I have a very simple python script that should scan a text file, which contains lines formatted as id='value' and put them into a dict. the python module is called chval.py and the input file is...

Visual Studio 2010: Could not resolve mscorlib for target framework '.NETFramework,Version=v4.0'

We are currently migrating all our solutions from 2005 to 2010 (that's right, we're skipping 2008!). We are also changing our file structure to make some more sense (some common projects would be...

barcode scanning in android emulator

I'm trying to do barcode scanning using Android emulator. Could anyone please tell me what steps to follow to do a simple barcode scanning on the emulator? Thank for any help,

Can't get Jetty to scan for annotated classes

I have an application with an embedded jetty server which I'm starting up like this (placed in main() and launched with eclipse): Server server = new Server(port); WebAppContext context = new...

mysql right join multiple tables

I’m new to mySQL and I’m struggling to write a query that will list all stores where a price for a product has been scanned as well as the stores where it has not been scanned. The following...

Data Structure for Subsequence Queries

In a program I need to efficiently answer queries of the following form: Given a set of strings A and a query string q return all s ∈ A such that q is a subsequence of s For example, given A =...

org.glassfish.jersey.server.ContainerException: java.lang.ExceptionInInitializerError when calling service

In my maven-project I get an java.lang.ExceptionInInitializerError when I'm calling my webservice. It seems, that there must be some problem when genereting the response. I can successfully call...

EJB injection into non managed objects

we are upgrading our web application to Oracle WebLogic 12c with EJB 3.x, and we got an issue. This is the scenario... We have a simple EJBs that we are going to call MyService, defined with its...

Jboss errors while starting

I am working on Spring mvc app using Jboss 7.1.1. When I start my server, following error appears: 13:23:34,569 ERROR [org.jboss.as] (MSC service thread 1-3) JBAS015875: JBoss AS 7.1.1.Final...

jboss as 7 Unable to connect to oracle 11.2.0.1.0

I am on jboss as 7 and i defined an oracle datasouce to oracle 11.2.0.1.0 when i use sql developer to connect to this database it works but throuw jboss it's impossible i've got this...

SpringBoot doesn't recognize RestController from another module in multi module Java application

I've spent quite some time but I can't get past this (configuration) issue. Technology stack : Java (1.8), Springboot (starter-parent, starter-web), Maven, IntelliJ IDEA Description: Trying to...

Find missing await in solution

I have lots of async methods in my server code, but I suspect that I have callers without await. Is there a simple way to scan the code for calls where await is missing? public async Task...

Postgres: check if array field contains value?

I'm sure this is a duplicate question in the sense that the answer is out there somewhere, but I haven't been able to find the answer after Googling for 10 minutes, so I'd appeal to the editors...

javax.el.ELException: Provider com.sun.el.ExpressionFactoryImpl not found

Despite a lot of problem solutions I have stuck on the problem with ELException: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'tilesConfigurer' defined in...

How can I securely transmit a unique customer QR code to business scanner?

There are two apps. One is for the customer that has their QR code under their profile (which at the moment is simply their unique customer id) and the other is for the business employee to scan...

User defined variables using SET is not working

I am using node 5.0.0 along with the node module mysql2 - 1.0.0-rc.11. It is working perfectly fine except when I try to use the user defined variables. Example : SET @user := 123456; SELECT *...

Add and save admin product variations custom field in Woocommerce

So I've got the following code which makes me add a Barcode field to the Inventory Options of a product. Now I also want to add this to each variations so I can easily add Variation Products when...

Ionic cordova-plugin-qrscanner has no camera preview

I run a simple demo to use cordova-plugin-qrscanner, it can scan qrcode but no camera preview. qrscannerDemo on Github Related code blow: import { Component } from '@angular/core'; import {...

How to capture all Wifi SCAN/MLME events on Android using nl80211.h?

I am trying to write a simple native app on Android to capture all Wifi related Events through Netlink MLME and SCAN events(especially I need Wifi Scan, Association, DisAssociation,...

When building a very simple PF4J plugin, my extension.idx file is empty. Why?

I'm trying to use PF4J in an existing codebase. I've tried to transfer all the necessary from the demo plugins and app to my existing maven project. I've compared the demo and my code, and I...

Python/Tkinter: Is there a way to constantly "scan" the inputs?

Im pretty new to python and tkinter and wrote a simple program where a user can fill 4 variables with input and can print it out in one button click. Now im wondering: Is there a way to make the...

I Can't Upload This Video File (mp4) To Twitter

I tried to upload a video file (mp4) to Twitter but the site complained it couldn't be uploaded. It seems Twitter has some conditions in order to allow a video upload: File Type: MP4 or MOV Max...

Why queries are getting progressively slower when using postgres with spring batch?

I'm running a job using Spring Batch 4.2.0 with postgres (11.2) as backend. It's all wrapped in a spring boot app. I've 5 steps and each runs using a simple partitioning strategy to divide data by...

How to design the relational database for inventory asset tracking of serialized and bulk items

Background Information: I'm learning Laravel 7 by creating an inventory tracking application. I have two models: Product and Stock. The Product can be Serialized, Bulk, or None...

Android 10 wifi connection can't reach gateway

I try to make a simple app that connect the smartphone to a specify wifi network and redirect to a webview that show a webserver connected on the wifi network by flashing a QR Code. When I flash...

Android Studio - AAPT: error: file failed to compile with PNG images

I was working on Ubuntu linux and recently i pulled my project and started working on Win10. From now on i cannot Build/Run my app. There must be a problem with those PNG files in the resources...

GCP Cloud SQL Query Logging for Postgres

I've been struggling for a few weeks now to try and get a Cloud SQL Postgres instance to do any type of query logging and I'm just not getting anywhere with it. I realise that this should be a...

Redirecting output of bluez btmgmt to file from systemd service

I try to have separate ssp modes during connection using Bluetooth btmgmt utility. Basic idea is scan current device OUI and select ssp on/off modes. But I can't get any answer from neither btmgmt...

Installing Kotlin-Jupyter: e: java.lang.NoClassDefFoundError: Could not initialize class org.jetbrains.kotlin.com.intellij.pom.java.LanguageLevel

I'm new to gradle, but recently I wanted to use Kotlin-Jupyter notebook for a project. I followed the instructions, I cloned the repo at https://github.com/Kotlin/kotlin-jupyter... Throughout my...