A bit weird, I ran into this situation earlier today, I needed to change the thousand grouping symbol from " .  "   to  "  ,  " but could not find the right section to change from, oddly the option to change this symbol was not in the application preference. After some fiddling around, finally got it to change. The solution was to change it from System Preference as shown below.

I bet you love that QR scanner screen from WhatsApp and have wondered how it can be achieved in your project. I like the WhatsApp web scanner and decided to implement a similar screen in a project I am presently working on. It is easy and can be done in few minutes. Here's how to achieve it. :)