When processing a CSV file and saving the columns into the %T% array, I'd like to be able to do something different every time %T[1]% changes. For instance, I have a CSV file with two columns and I want to process the file and refer to the previous line and save that value off to a variable as I'm processing it so I can refer to it later. Seems like such a simple thing to do, but nothing I've tried yet has worked. Any ideas?
ABC,123
ABC,324
ABC,567
DEF,345
DEF,786