Scottish Ruby Conference Charity Tutorial

gistfile1.rb

def counter(start=0, increment=1)
    lambda do 
        ret = start
        start += increment
        ret
    end
end

result = counter(10, 2);
result2 = counter(10, 2);

puts result.call;  # 10
puts result.call;  # 12

puts result2.call;  # 10
puts result2.call;  # 12