derekcoder

//: A UIKit based Playground for presenting user interface
  
import UIKit
import PlaygroundSupport

extension Notification {
    struct UserInfoKey<ValueType>: Hashable {
        let key: String
    }
    

derekcoder

public struct BoundedSequence<Base>: Sequence, IteratorProtocol where Base: Sequence {
    public struct Boundary: Equatable {
        public let isStart: Bool
        public let isEnd: Bool
    }
    
    private var _iterator: Base.Iterator
    private var _previous: Base.Element?
    private var _current: Base.Element?
    private var _next: Base.Element?

derekcoder

# 1
post_install do |installer|
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |configuration|
      configuration.build_settings['SWIFT_VERSION'] = "4.0"
    end
  end
end

# 2