Swift 2 - For/In/Where

Swift is pretty awesome and the more I use it the more I love it! The where keyword is really useful for quick and simple filtering.

You can do it like this and its pretty straight forward:

for subview in view.subviews {
	if subview.isKindOfClass(UIButton.self){
		subview.removeFromSuperview()
	}
}

Or you could do it with a filter function:

for subview in view.subviews.filter({ return $0.isKindOfClass(UIButton.self) }) {
	subview.removeFromSuperview()
}

or you could use the where keyword which I find much more readable.

for subview in view.subviews where subview.isKindOfClass(UIButton.self){
	subview.removeFromSuperview()
}

Only downside that I can see with using where is that you can’t chain multiple predicates together like you can with filter functions.