firstElement.swift

extension SequenceType {
    
    @warn_unused_result
    func firstElement(@noescape predicate: (Self.Generator.Element) throws -> Bool) rethrows -> Self.Generator.Element? {
        for element in self {
            if try predicate(element) {
                return element
            }
        }
        
        return nil
    }
}

Swift SequenceType extension to get the first element of a collection that matches the predicate closure passed in.