Download: yandex upload.ee (RU\EN)
Screenshot of the program on Linux
Tasks performed by the program
UpdateUnique lines of the 2nd file that are not in the first one.
Same lines in 2 files.
Unique lines of the same file, removes duplicates.
Count unique lines of one file.
Merge lines of 2 files.
Protecting against blank lines in input fields
Removing a delimiter at the end of a line
Added display of the number of lines and task execution time in the status bar.
Added "Merge lines of 2 files"
Added "case sensitive"
Added "Whole line is delimiter"