This code counts consecutive lines in standard input

consecutive_line_counter2.rb

data = []
while s = gets
    data << s.chomp
end

tmp = {}
data.each do |item|
    if tmp.has_key?(item) then
        tmp[item] << item
    else
        tmp[item] = [item]
    end 
end 

tmp.each_key do |key|
    print key, ",", tmp[key].size, "\n"
end