RGS questions

• Improve a big mysql select performance
• check if year in string is = or bigger than 2017
• Allow just one click in class JQUERY
• how to add border in an arrow before a div?
• Can I still use smart_banner in XML?
• recyclerView setOnScrollChangeListener = need api 23 (current min is 15)
• Avoid WorkManager to run immediately?
• center a div inside a fixed one at the center of the screen
• run a function inside FOR every 10 seconds
• scroll header when scroll recyclerview items

RGS answers