I’m recently doing an IoT project. I wanted to investigate the network layer, and to do so I use Wireshark to capture the network traffic between my iOS apps and IoT hardware. Let’s see how to start packet sniffing using Wireshark!   Install Wireshark Wireshark is free and open-source. You can download Wireshark from its official website https://www.wireshark.org/. Once installed, open Wireshark and run the following command to check the existing interfaces: ifconfig...

I had the issue where I needed to filter an array list by a specific column.  In my instance, the column is language.  To be able to reduce the query to the language column the code required is levels = selectedCategory?.levels.filter("language = %@", language)Language can be any string, in this instance for me language is a two alpha character such as 'fr', 'en' or 'de'. Further to this you can continue to chain this query through including sort as per levels =...