Coordinators Essential tutorial. Part I

In 2015, at the well-known iOS conference NSSpain’15, Soroush Khanlou made an introductory talk “Presenting Coordinators”. During this talk he described the whole idea of Coordinators and showed some examples written in Objective-C. The general idea is taken…

Pure Functional Validation in a Nutshell

There are several different ways to model errors in typed functional programming, depending on your specific needs.

Maybe

Maybe is a datatype that represents a computation (or an effect) that might not…

Documentation driven development

This post describes how the mobile team at Blacklane works with documentation. We don’t claim that writing a documentation makes everyone’s work better however the documentation we write and maintain definitely makes our own work better and easier. When you do something…

Code Ownership

The following document explains why the need for explicit code ownership practice is important, and how it can directly solve a plethora of common problems facing software engineers in their everyday work. This includes slow code reviews, increasing technical debt, slow development and ambiguity of…

State saving in Android MVP with Kotlin delegates

Now you’re probably thinking, “Oh no, not another blog post about MVWhatever. I hoped we left it in 2k17”. Yes, but with Kotlin everything is getting better, so let’s discuss an old topic again.

Blacklane Developer Journeys: Thomas — Director of Engineering

Mail google form submissions as PDFs

How to design and implement a service for creating a Google Form, using the submitted data for filling in a spreadsheet template, generating a PDF from it and emailing the result to the Google Form submitter. It is assumed throughout this post that you are familiar…

Blacklane Developer Journeys: Philipp — Backend Developer