Understanding Optionals in Swift What are they for? In Objective-C, you can safely send a message to nil, which will return something treated as nil, or NO, or 0(this variety is part of the reason Swift has optionals, of which more later). This is a useful and powerful feature, but it only applies to Objective-C objects. There’s no universal way to deal with absent or no-value types such as integers, floats or Booleans.
Hermes, or Mercury to the Romans, is the god of commerce and the trade. He also delivered the divine message to mortals and deities alike. This swift god stole his brother Apollo's prized bulls moments after his birth. Zeus was impressed by the little thief and as to spare feelings Hermes introduced the Lyre and other types of music to Apollo.
1950s brooch is in excellent order. It shows a Swallow or Swift type of bird on the wing. A romantic message is conveyed in this lovely pin. The Swallow or Swift when used in antique and vintage jewellery says 'I will return'. This vintage brooch is finished in two shades of blue cold enamel and has a marcasite effect decorating the head, tips of wings and forks of the tail.