I wish to read through csv files and then write info directly after the read info.
Now, I know how to read through the CSV file, but I don't know how I can:
-move downwards in the csv file
-then go back to a specific point
-then add data next to the current data
Any help would be so much appreciated.
Thanks for your reply.
The thing is, there are multi millions of lines in the CSV files. Putting it all in arrays would take lots of RAM.
Is there any other way?