SWIFT

Swift Closures as Function Parameter

// define a function
func grabLunch(search: () -> ()) {
  …
  // closure call
  search()  
}

Swift Closure Parameters

// closure that accepts one parameter
let greetUser = { (name: String)  in
    print("Hey there, (name).")
}

// closure call
greetUser("Delilah")

Swift Closure as function parameter

// define a function and pass closure
func grabLunch(search: ()->()) {
  print("Let's go out for lunch")

  // closure call
  search()
}

// pass closure as a parameter
grabLunch(search: {
   print("Alfredo's Pizza: 2 miles away")
})