Write a function that takes a string and returns an array of any hashtags it contains:
get_tags("Nothing is true. Everything is deprecated. #yolo #deprecated #bloating")
# => ['#yolo', '#deprecated', '#bloating']
Write a function that takes a string and returns an array of any @mentions it contains:
get_mentions("@sydneyga Some @jerk won't hire women because they get pregnant #rorosyd #smdh #misandry")
# => ['@sydneyga', '@jerk']