A closure to reuse button creation code.

createButton.swift

import UIKit

let makeButton = { (title: String) -> UIButton in
  let button = UIButton.buttonWithType(.System) as UIButton
  button.setTranslatesAutoresizingMaskIntoConstraints(false)
  button.layer.cornerRadius = 5
  button.layer.borderWidth = 1.0
  button.layer.borderColor = UIColor.yellowColor().CGColor
  button.setTitle(title, forState: .Normal)
  return button
}

let workButton = makeButton(NSLocalizedString("Work", comment: "Start working button title"))