In Swift, how can I check if an element exists in an array? Xcode does not have any suggestions for contain, include, or has, and a quick search through the book turned up nothing. Any idea how to check for this? I know that there is a method find that returns the index number, but is there a method that returns a boolean like ruby's #include??

Example of what I need:

var elements = [1,2,3,4,5]
if elements.contains(5) {
  //do something
}