A Java geek

One of the earliest and most fundamental principle one learns while coding is programming by interface. Definition Interface-based programming defines the application as a collection of components, in which Application Programming Interface (API) calls between components may only be made through abstract interfaces, not concrete classes. Instances of classes will generally be obtained through other interfaces using techniques such as the Factory pattern. — Wikipedia https://en.

This is the 5th post in the JVM Security focus series. A post brought to light an interesting feature of the JDK I didn’t know about: the ability to update a code running in a JVM. The referenced post shows how to apply a bugfix using that feature. The devious white hat JVM hacker in me started to think how one could apply that trick for other less beneficial purposes. And of course, how to prevent that.

When streams were added to Java 8, I wanted to jump on the bandwagon. I read blog posts, watched videos, attended workshops to understand what this was all about. After a while, I became comfortable enough…​ but I was unhappy with the implementation: while streams offer methods with a functional approach, legacy collections do not. When one wants to use Java capabilities on an existing collection, the later needs to be transformed to a stream, and then back again.

Some weeks ago, I read the post referenced in a tweet. In short, the article provides two ways to generate the boilerplate code required by the Builder pattern: Lombok, to generate code at compile time and the Spark Eclipse plugin, to generate code at development time. However, I already wrote about the Builder pattern. And it’s a bit more complex than what’s described in the referenced post.

This is the 6th post in the Learning Clojure focus series. In general, one learns by comparing to what one already knows: I’m learning Clojure in that way. Coming from a Java background, I naturally want to use streaming features. So, what would be the Clojure counterparts of Java’s functions filter(), map(), etc.?