Alle Blogbeiträge zum Thema: scala

Recursion Schemes 02

Nachdem im ersten Teil einige Catamorphismen vorgestellt wurden, die mit rekursiven Datenstrukturen arbeiten, beschäftigen wir uns nun erstmal mit dem Gegenteil. Ein Anamorphismus verwendet eine CoAlgebra von Typ a -> f a, um eine Datentypen aufzubauen. Damit habe ich es auch eilig, denn ich bin es leid, mir Testdaten stets mühselig im Stile von Node 3 (Leaf (Node 4 Leaf Leaf)) aufzubauen.

I found a post by Qiaochu Yuan that has the following definiton: A comathematician is a device for turning cotheorems into ffee.

Apparently this is a very funny joke. Could someone explain it to me and tell me where I could learn about the subject in question? Thank you very much in advance.

Today we talk about the little wiggly operator |@|. Being slightly deaf and one of the few living persons on this planet who never watched a Star Wars movie, I always thought people call this the allah al akbar operator, when in fact it is called the Admiral Ackbar operator. If you haven’t so far, please read the post about Applicatives as this blog post builds on top of it.

Jetzt ist es offiziell: Seit 6 Monaten arbeiten wir von inoio zusammen mit weiteren Dienstleistern und Galeria ­­­­­­­­­­Kaufhof an deren neuer Multi-Channel Online Plattform - Projektname “Jump”. Mit dem neuen System soll die Time-to-Market erheblich reduziert werden, wenn es um die Einbindung und Entwicklung neuer Features geht.

Almost immediately when I started to program in Scala, I became intruiged by scalaz, the scala type class library. After playing and learning a bit, I decided that I essentially rewrite the library to get a better understanding of its concepts. I do not intend to replace scalaz, I skip lots of the optimization techniques, and left out many of the “non essential functions”. Gradually I will blog about the experiences and compile a tutorial much in the style of the essential Learning scalaz by Eugene Yokota.

In our current project we have to consume a REST web service that provides data as a multipart document, e.g. a list of videos (or video metadata) where each video is a single part. While it’s common to submit or handle multipart requests (e.g. multipart/form-data), the multipart content type is not widely used for http responses. In consequence, the support of http clients for multipart responses is not as good as for requests. The Play Frameworks WS client for example does not directly support responses of type multipart/*.

We develop custom software, sometimes from scratch, sometimes it will be included in existing ecosystems. In both cases, the customer oftentimes wants to fix which technology we should use. We take the customer’s requests into consideration a lot, but try not to give him what he wants, but the best overall solution given the parameters of the project. Oftentimes we recommend Scala as a programming language, despite the fact that customers want Plain Old Java.