Welcome to TechScreen

Welcome to the TechScreen site. This side shall support the exchange of knowledge in the domain of Web Engineering and related aspects. As a side effect, this side is used for research on knowledge management technologies. User can pose challenges in the problem domain and can participate in quizzes. Further a bibliography about arcticles in different related domains is continously extended. Finally, questionnaires on different issues are provided. To be able to participate you need an account and a password from TU Wien's TISS system.

Managing my ToDos

I like being organized, and I need to have a good overview of all my current todos. Sadly, I could not find any good program that would meet my expectations. What I want is a program that I can model todos out of different areas of my live with. The program should have the ability to attach text, images, checklists, and other kind of additional information to each task, create subtasks and model dependencies between tasks, i.e. task n can only be done when task n-1 is done, or as soon as task x is completed, remind me to do task x+1.

Angular error input field

I am working on an Angular application and try to acces a value of an input field. I receive following error: "Can't bind to 'ngModel' since it isn't a known property of 'input'" Can anybody help me out?

Accessible Websites

According to the web accessibility act (“Web-Zugänglichkeits-Gesetz” – WZG) of the Austrian government, the websites of all the institutions that are funded by the government, as is TU Wien, have to be accessible according to the Web Content Accessibility Guidelines (WCAG). While the technical aspects are almost done, most of the editors have done nothing to make their areas accessible.

Repeatedly forgot to mention issue number of ticket in commit message

I repeatedly forgot to mention the ticket number of the corresponding gitlab issue in my commit messages. This is a Problem because it makes a tracing of the issues impossible.

Efficient and user-friendly email entry field

I am working with React and want a system that allows users to enter multiple emails without too much overhead. The system should create new textboxes automatically as old ones are filled in, and delete text boxes in case they are empty. The users should also be able to paste a list of emails into a textbox, which would be properly parsed and split into multiple textboxes. Additionally, the entered addresses should be verified to make sure that they are valid on the client-side. What would be the best design for such a system?

Want to watch a video in the internet – This video is not available in your country

Sometimes you want to watch some videos and get the error message “This video is not available in your country”. This is because you are connect with the internet in some country, but the video is only available in other countries.

Git merge your branch into other branch – Merge Conflict

Every time you have finished programming your ticket you try to merge your branch back into the dev branch. The dev branch may have changed in the meantime due to changes from other developers. If you have worked on the same file as the other developers, it can happen that automatic merging is not possible. Then you get the message: “Can´t resolve conflicts”.

Android Webapp with Kotlin in Android Studio – Virtual Device can´t start

If you develop an android app, you can test your app on a virtual device. Therefore you can create a new virtual device in android studio in the settings AVD manager. In this manager you can create and start virtual devices. If you start a virtualization for the first time on your pc, you get the error message “Could not star AVD”. This happens because the bios setting VTx is disabled by default.

How to make an apt repository

My application should deliver packages via apt repository. After we create ubuntu packages we need to publish them. What is an efficient way of creating a package repository?

Could not pull from git repository – wrong credentials on windows

I changed my password on the github repository and Intellij asks again for the new credentials. I used the new credentials but it still tells me that I am using wrong credentials. I tried using the old credentials and it still gives me the wrong credentials. I invalidating cache and restarting IntelliJ, but it didn't work and I also tried from windows terminal but it still returns invalid credentials. I tried logging in via the webpage and it works


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