How to format UITextField for credit card input

So you are writing an app which has credit card entry form and you want to format the credit card numbers and expiry as xxxx-xxxx-xxxx-xxxx, xx/xx. How do you do that? Let’s first start with how can you pass your UITextField text to formatter…

How to implement Mergesort in Python

Recently I have been trying to do a lot of reading about some very common CS principles. This is the first of the series of posts that I am going to do covering some very basic sorting algorithms, trees, linked lists, etc.

TouchID hacking nonsense

So this group called CCC (Chaos Computer Club) described the process to “hack” TouchID as being really easy, one…