gistfile1.txt

def scan(text)
    text =~ /^([0-9]{1,2})[-\.]([0-9]{1,2})[-\.]([0-9]{4})/
end

loop do
    loop do
        puts "Podaj pierwsza date (format: dd-mm-rrrr)"

        if scan(d1 = gets.chop!)
            break
        end 
    end 

    loop do  
        puts "Podaj druga date (format: dd-mm-rrrr)"
        if scan(d2 = gets.chop!)
            break
        end 
    end 

    puts "OK, obie daty sa poprawne"
end