Juan Pedro Bolívar Puente — Squaring the circle: value oriented design in an object oriented system

In this talk, we will present a new open-source library of cursors. Cursors are inspired by functional lenses and reactive streams to provide composable and modular facades to “single atom“ value storages. We will see how this can be used to navigate the tension between object-oriented and value-oriented design, and build an example interactive application using Qt and QML against a value-based data-model. Value-oriented design reconciles functional and procedural programming by focusing on value semantics. Like functional programming, it promotes local reasoning and composition — it is, however, pragmatic and can be implemented in idiomatic C . In previous talks, the speaker has discussed how immutable data-structures help use value semantics at scale, and how the Unidirectional Data-flow Architecture (Redux, Elm) provide a solid foundation for designing interactive software based on values and functions. However, we rarely have the luxury of starting from scratch. We are often embed