How to compare and sort 2 csv's to show difference

Question

Hi I have 2 csv\'s in the following format, (basically a list of email and the number of times we have been emailed by that sender):

file1.csv

Email,Val         


        

Answer 1

1. build a loop running through each line from the first file.

2. in that loop, build another loop comparing each line of the second file to the current line of the first file.

3. write matches to your new file.