HighandLow.rb

=begin

In this little assignment you are given a string of space separated numbers, and
have to return the highest and lowest number.

Example:

high_and_low("1 2 3 4 5")  # return "5 1"
high_and_low("1 2 -3 4 5") # return "5 -3"
high_and_low("1 9 3 4 -5") # return "9 -5"
Notes:

All numbers are valid Int32, no need to validate them.
There will always be at least one number in the input string.
Output string must be two numbers separated by a single space, and highest
number is first.

=end

# My Solution
def high_and_low(numbers)
  numbers = numbers.split(" ")
  numbers = numbers.map {|x| x.to_i}.sort
  "#{numbers.last} #{numbers.first}"
end

# Better Solution
def high_and_low(numbers)
  numbers.split.map(&:to_i).minmax.reverse.join(' ')
end

# Another Solution
def high_and_low(numbers)
  a = numbers.split.map(&:to_i).sort
  "#{a.last} #{a.first}"
end