Safe element retrieval for Swift collections

Collection+SafeElementRetrieval.swift

infix operator ~>: DefaultPrecedence

extension Collection {
  
  /// Returns the element at the specified index if it is within bounds, otherwise nil.
  ///
  /// This extension allows you to write code as follows:
  /// - Example:
  ///   ```
  ///   if let element = array ~> index {
  ///     // do something with element
  ///   } else {
  ///     // handle case where the index is out of the bounds
  ///     // of the array
  ///   }
  /// 	```
  ///
  /// - Parameters:
  ///   - collection: The collection where the item to be retreived is.
  ///   - index: The index of the item to be retrieved
  ///
  /// - Returns: Returns the `Element` at the specified `index` or `nil` if the specified
  ///            `index` is out of bounds.
  static func ~>(collection: Self, index: Index) -> Element? {
    return collection.indices.contains(index) ? collection[index] : nil
  }
}