Lottery number generator def getRandomNumbers(count, min, max)
  array = []

    while array.length &lt; count
      tmp = rand(max) + min
      if array.include?(tmp)
        next
      else
        array.push(tmp)
      end
    end

  return array
end


def prettyPrint(someArray)
  string = ""
  someArray.each do |item|
    string += item.to_s + "\t"
  end
  puts string
end

array = getRandomNumbers(6, 1, 49)
prettyPrint(array)


I'm just learning Ruby and wrote this little two functions just to play around and get a feel for Ruby syntax etc.
I wanted a function that generates a given amount of random numbers within certain limits. In this example for 6 lottery numbers, therefore each number should only occur once. The second method is pretty self explanatory.

The code runs and does what he is supposed to do. However, what are nice tweaks and tricks to make this code nicer and utilizing the abilities of Ruby?
A min-max pair would be slightly better represented using a Range.  In fact, starting with Ruby 1.9, rand can accept a range.

The loop can be written a bit more succinctly.

The pretty-printing function should also be written in one line instead.

lower_case is a more conventional naming convention.  An explicit return is not necessary, as the code returns the last value anyway.

def get_random_numbers(range, count=1)
  array = []
  while array.length &lt; count
    n = rand(range)
    array.push(n) unless array.include?(n)
  end
  array
end

def pretty_print(array)
  puts array.join("\t")
end

pretty_print(get_random_numbers(1..49, 6)