CCNA, CCNP, MCSA, CCNA Final Exam, All Answer Test Module With 100/100

I've seen the "share via" dialogs that are in apps like TFLN (texts from last night). Looks like this:

I'm trying to use in my Android Application the notifyDataSetChanged method for an ArrayAdapter but it doesnt't work for me.

I am new to Android development. I know if you change a android phone from portrait to landscape sometimes the app relays its self out on the screen.. so how do I simulate rotating a phone with the AVD? On the Blackberry emulators there's a button in the menu to turn the phone, but I can't find it or any option on the Android ones?

i am creating a new feature on my site that allow people to send postcard to friends. in this section they can choose the image they want to send (they already uplaoded the image to their profile -> my pictures section)

i made a mistake and i have to split 1 table into 2. i have a product table and i need category table. when i started i only had 1 category per product but not (with new business requirement) i need the ability to put a product in multiple category.

I'm trying to convert a Math Formula into PHP code. You can see the formula in the accepted answer here: Applying a Math Formula in a more elegant way (maybe a recursive call would do the trick) .

I have a website (with ESI) that uses Symfony2 reverse proxy for caching. Average response is around 100ms. I tried to install Varnish on server to try it out. I followed guide from Symfony cookbook step by step, deleted everything in cache folder, but http_cache folder was still created when I tried it out. So I figured I could try to comment out $kernel = new AppCache($kernel); from app.php . That worked pretty well. http_cache wasn't created anymore and by varnishstat, Varnish seemed to be working: