Swift-Binary-Search-on-Integer-Array

Example usage:

let array = [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ]

rank(array, 0)

rank(array, 1)

rank(array, 2)

rank(array, 3)

rank(array, 4)

rank(array, 5)

rank(array, 6)

rank(array, 7)

rank(array, 8)

rank(array, 9)

rank(array, 10)

rank(array, 11)