A simple guide to testing old code — Having a unit test is always important and gives us so many benefits. It gives you feedback quickly and minimizes your code from having critical bugs in production. Unit tests also protect you one step at a time when you want to do a big refactor in your codebase. A…

This would be my first article that talk about concurrency in iOS Introduction to Concurrency Concurrency is one of the most important topics that iOS developer need to know. We can use concurrency to create smooth, reliable, and responsive application. Your user will rarely appreciate you when your app is perform well. But…

Hide any frameworks implementation from your features. Overview When we building an application, sometime we need to use frameworks or libraries to help us develop the feature. It is an efficient way because we don’t have a much time to write all codes by ourself. For example when we need an…

How to solve tech debt without create a new tech debt? :] In a startup tech company, it is often that we need to create a big decision about the development feature in our application. You only have a few team mates and it is quite hard to create a…

RGUIKit is a modern declarative UI Framework to simplify and accelerate UI development on iOS. The Background Ruangguru is a comprehensive online learning app that offers a lot of different products and features in a single app. Almost all of its features have dynamic and complex UI layouts. This is a challenge…

In this article I am gonna talk about how we can prepare design architecture for large iOS application. Designing an architecture for large applications is not an easy task. The purpose of the architecture is to make the system easy to develop, easy to maintain, accelerate further feature development, and…

In this article I will show you how to start implement test-driven development to create a simple Flow object in iOS. Test-Driven Development Test-driven development (TDD) is a methodology in software development that require us to create the test first before the production code. This methodology has so many advantages such us…

Happy new year everyone! back to design pattern series :] What is Command Design Pattern? Command design pattern is behavioural pattern that encapsulate command or action as an object. Command design pattern commonly has three main components which are Invoker, Command, and Receiver.

Strategy design pattern is one of many weapons that we can use to build scalable system. Analytic tracker feature probably is one of the most important feature that many mobile applications use in these day. …