18 hours ago
Please I need help...
I have two lists, file1 and file2. The list file1 has only usernames, while file2 has the same usernames but with additional columns (username|private yes or no|id).
Basically I need to know the ID (which is in file2) of the usernames which are in file1.
file1 (50k lines):
file2 (500k lines):