Guido Flohr

I currently work on a web application that allows users to supply a link to their homepage. Such links have to be validated client-side with JavaScript (actually Typescript/Angular) and with Perl on the server-side. But what should be accepted as a valid homepage link? And what is the right approach to analyze the provided URLs?

While displaying a Bootstrap modal dialog in Angular is fairly simple, doing so inside an NgRx effect is a little tricker. This post walks you through all necessary step to get the job done inside a simple Angular counter application.

The use of a Google API Key can be restricted to a configurable set of host or domain names. But does this protect (ab)use of the key by others? Not really.

On April 5th, 2018 I had talked about Qgoda at the German Perl Workshop 2018. The video of the talk is now online.

The mere mention of Unicode in the context of Template Toolkit causes great wailing and chattering of teeth with many a Perl hacker. You will encounter double encoded UTF-8 or arbitrarily thrown in question marks in a seemingly random fashion. How can this be avoided?

I sometimes receive the good advice to make my regular expressions more concise with the /i modifier or using backslash character classes like \d, \s or the like. But I avoid them on purpose. Why?