Apart from the HTTP response code discussion, I think the talk itself was good. I've also attended your Techademy REST workshop, but it was nice to hear about the topic again.
As already mentioned you should look at your time for sure. When running out of time (or tending to), please do not go over slides quicker than you should. Perhaps it's an idea to have some anchor points (like sub-topics, extra examples etc.) in your presentation which you can skip when running out of time.
With a presentation the audience doesn't know what you want to tell, so it's not an issue to skip particular slides / subtopics and people still are able to get the message. By racing through the slides, people might lose you and that'll hurt your message.
I won't say anything on the colors, as it's been said multiple times now. I've seen the SOLID principle in a presentation at PHPBenelux already, but this was a nice recap and easy to follow.
All in all I think this was a nice practice of your presentation. Sometimes I had the feeling you were not completely telling what you actually had in mind to tell, but this can easily be solved by practicing the presentation one or more times again.
Good to see this talk evolve from an internal concept to conference ready material. Just skip some information here and there... You try to share to much information on some points. In this case it wasn't any problem, but on conferences you won't get that time!
And no, it is for sure a 301 instead of a 303! ;)
I liked the talk a lot and it gives enough room for discussion on some of the principles. Some of the principles might be explained a bit better by also providing a bit more abstract code. On occasion I didn't really understand how a certain piece of code would actually accomplish the principle you were talking about. Doing a small abstract snippet might put things in perspective earlier to the actual bike-examples make a bit more sense (or maybe it's just me :)).
The used color scheme might become a bit of a problem, especially when doing this talk on a bright-lit room with a (low intensity) beamer, which accounts for 90% of the conferences :). I suggest doing a white background, seems like you guys know white :P
A nice talk with some genuinely new information on REST. It needs to be polished a bit, but that's not a surprise since it was the first time you gave it.
On one hand you could say you need to look at the time, but on the other hand I was completely fascinated and feel sorry you had to skip some of it.
At times you seemed a bit nervous and had some difficulties finding your words (which was probably not helped by presenting English slides in Dutch), but you are obviously very knowledgeable and enthusiastic and I'm looking forward to seeing more.
Heard a lot to think about. It will take some time for me to get to that part of programming, but good to have heard of. Too bad the time was limited.
Good interaction with the participants.
Thanks for your time and effort!
In this workshop again I learned a lot about programming howto's. Still a lot to learn for me. It wasn't always clear to me that a subject still got more data. I think the subjects have more depth.
The time was limited, but you could try to give the listener room for his own thougths on why something is thought up the way it was. A little more time for small discussions.
As Jeroen van Dijk said: For a first timer: Well done! Thnx!
Again a good in-depth talk by Joshua, good content and in-depth knowledge of the topic… just make sure you got the HTTP codes correct. Also, look at your time!