Swift and Ruby comparison

modern.rb

cities = ["London", "San Francisco", "Tokyo", "Barcelona", "Sydney"]

sorted_cities = cities.sort

if sorted_cities.include?("London")
  puts "London is city number #{sorted_cities.index('London')} in the list"
}

modern.swift

let cities = ["London", "San Francisco", "Tokyo", "Barcelona", "Sydney"]

let sortedCities = sort(cities) { $0 < $1 }

if let indexOfLondon = find(sortedCities, "London") {
    println("London is city number \(indexOfLondon + 1) in the list")
}

safe.rb

def configure_labels(labels: [])
 label_text_color = UIColor.green_color

  labels.each do |label|
    # label inferred to be UILabel
    label.text_color = label_text_color
  end
end

safe.swift

func configureLabels(labels: UILabel[]) {
    let labelTextColor = UIColor.greenColor()

    for label in labels {
        // label inferred to be UILabel
        label.textColor = labelTextColor
    }
}

https://developer.apple.com/library/prerelease/ios/referencelibrary/GettingStarted/LandingPage/index.html