Logtalk - Hello World
According to the SWI-Prolog Mailing List, ... Logtalk is an object-oriented logic programming language that can use most Prolog implementations as a back-end compiler. As a multi-paradigm language, it includes support for both prototypes and classes, protocols (interfaces), component-based programming through category-based composition, event-driven programming, and high-level multi-threading programming. For this, it seems worth trying Logtalk in order to lift Prolog programming to a different level (more contained). As usually, the first program show-casing some programming language is the famous "hello world" program. Unlike, other programming languages the Prolog version of "hello world" is a family relation. Since this post is merely to maintain flow, I will present a "hello world" in Logtalk. Logtalk helps decomposing program logic by offering the well known concept of object and interface (including visibility of object members). Behold .. the magic...