Archives: code

Google Analytics for Firebase

a.k.a. How not to expect too much and fail miserably with Google Analytics for Firebase Have you ever wondered how many people use your brand new “Shopping App”? Has anyone actually bought anything? Which country do they live in? Which one is the language most used in your app? Has anyone managed to beat the ULTIMATE SUPER […]

Solutions for a filterable sortable pageable list in Spring

(GraphQL, REST, …) Hello again everybody, it’s Süxy here!  Today we are going to take a look at several custom implementations for the good old “filterable + sortable + pageable list” problem. In this post we are going to compare the oldschool REST solution with GraphQL and our custom solution (both at the source code level and performance), […]

Learning by Doing – BlockChain & Akka Tutorial

Intro BlockChain is a really hot topic in the IT world. Most of the developers have no idea how it works. There are general ideas in the heads, but it’s full of black-boxes. There are several blog posts and toy-projects online to demonstrate some basic idea about Blockchain. This will be one of these. I […]

Ethereum in your browser – a web3.js introduction

Ethereum in your browser – a web3.js introduction

Brief look at the blockchain The blockchain is the base of all cryptocurrencies. It’s like a huge stone wall where all of the crypto transactions are stored. It’s a list of records (blocks) which are linked together using cryptography. The blockchains used by cryptocurrencies are open to the public. Each block contains: A cryptographic hash which links […]

Localization on iOS: how Wanari deals with it.

Localization, why? If you want to reach the most possible users with your app, you will probably need it to support multiple languages. Luckily we have a solution: localization. In this article I will mostly talk about how we started localization, what difficulties we faced, how we solved them, and what’s our current (not final) […]

A more insightful look into IBDesignable and IBInspectable

Intro If you’re an iOS developer, you’ve probably come across the keywords IBDesignable and IBInspectable at some point. Their concept is fairly simple and easy to grasp: An IBInspectable property can be set from the Interface Builder, and an IBDesignable view will reflect your IBInspectable property changes immediately in the IB after your set it. […]

Push Notifications – a bigger picture

Many applications we create require the ability to send push notifications. Sometimes we are the ones who made the client and the backend side as well. The available tutorials are helpful but not always entirely clear; we met quite a few challenges. Let’s look at a specific example. –          We’d like to send a push notification from […]

How to make a custom Username Password Authentication Filter with Spring Security

  Introduction Basically I’ll show you how to use Spring Security and how to customize it if you want. First we’ll implement the basic authentication with basic responses and other stuff, and I’ll show you how to customize the login and logout process as you wish  Simple Authentication After you added the required dependencies described on Spring’s website, […]