Articles written by Elviro Rocca
Maintaining state is the main cause of complexity and headaches in software development: without a careful consideration of state, our projects will inevitably become impossible to understand. In fact, various development techniques and programming styles are mainly there to handle state in a responsible way: for example, monads, as used in functional programming, are often employed for this very task. A good general way of managing state is trying to make it immutable, either through the use…
Last time we looked at the Signal class, that is, a simple, reusable way of encapsulating the observer pattern. There are many use cases for a signal, and I’m going to show one possible application, spawned from a real-world problem. View controllers’ composition and decoupling is hard: we often need an input from a view controller, that has to send its input back to its creator, while handling the back navigation somehow. We often find ourselves in a situation in which several…
Last time we looked at a possible implementation for the Optional type in Objective-C; while the main point was to port to Objective-C a tool that’s frequently used in Swift, making use of the Optional class can be considered an application of a much more general concept: code reuse. In fact, Optional is not tied to a particular domain, and can be reused over and over again in multiple projects: that’s what actually happens in Swift. But, to think about it, that’s what happens…
L’ultima volta abbiamo visto una possibile implementazione del tipo Optional in Objective-C; l’obiettivo primario dell’articolo era quello di importare in Objective-C uno strumento frequentemente utilizzato in Swift, ma usare una classe come Optional può essere considerato un’applicazione di un concetto molto più generale: il riutilizzo del codice. In effetti, Optional non è legato a un particolare dominio, e può essere riutilizzato più e più volte in molti progetti:…
L’appuntamento con il Codemotion di quest’anno a Milano è stato particolarmente ricco: tante tracce, moltissimi contenuti suddivisi tra talk tecnici, workshop e keynote, e alcuni ospiti illustri, tra cui il celebre Rasmus Lerdorf, creatore del linguaggio PHP. Come già fatto per il PHP Day 2015, proponiamo le nostre impressioni sulla conferenza, citando i talk che ci hanno colpito maggiormente: la scelta dei talk è basata sul gusto personale dei vari membri della redazione di…
