tuples

# Tuples: a fixed group of values, each with its own type.

pair = {1, "one"}
puts pair[0]
puts pair[1]

# Unpack into variables.
number, word = pair
puts "#{number} is #{word}"

# A named tuple gives each slot a name.
person = {name: "Ayşe", age: 31}
puts person[:name]
puts person[:age]

# A function that answers several things at once.
def min_max(items : Array(Int32)) : Tuple(Int32, Int32)
  low = items.first
  high = items.first
  items.each do |n|
    low = n if n < low
    high = n if n > high
  end
  {low, high}
end

low, high = min_max([7, 2, 9, 4])
puts "#{low}..#{high}"