David Wolf

How to bake cookies using HTTP: The "Set-Cookie" and "Cookie" HTTP headers

You can create a cookie by adding a Set-Cookie HTTP header to an HTTP response. The client browser which receives that response uses the provided directive to…

Introduction into the Hypertext Transfer Protocol (HTTP)

The Hypertext Transfer Protocol (HTTP) is how web browser (client side) and web server (server side) communicate with each other. Communication in terms of…

Rough Overview of the Transmission Control Protocol (TCP)

The Transmission Control Protocol (TCP) is used to transfer data across the internet. On top of that, the protocol ensures that the transferred data retrieves…

Let's bake some Cookies: Introduction into Cookies on the Web (HTTP Cookies)

You heard about cookies. At least, you get penetrated with these annoying "we use cookies" banners or even dialogue boxes. You ever asked yourself…

What is an Entity-Relationship Model (ER Model)?

Entity-relationship models are a graphical abstraction of data models. They can be used to describe how different entities are related to each other. In other…

HTTP "Clear-Site-Data": How to force cache clearing for all of your website

Everybody knows this situation: You just rolled out that fresh new feature to your website. It is online now. Yeah. You refresh your website in the browser and…

What the heck is a junior developer, what is a senior developer?

Did you ever come across the terms junior developer and senior developer? Why I am even asking – sure you did, that’s why you are reading this, right? In this…

How to combine all text files of a folder into a single file using Bash on

You have a directory structure of a folder containing a handful of text files? And you want to merge all these files in that specific folder into a single text…

Introduction and Overview of the Internet Protocol (IPv4 and IPv6)

IP-addresses are unique: As soon as you connect your computer to the internet, your computer gets a unique IP-address assigned, which only your individual…

A practical example of normalization in relational databases

After learning about the concept of primary keys as well as foreign keys in relation databases and how to use them in theory, its time to take that onto a more…