I want to find the number of unique words in my file named cdj.tsv. I can use head -n 1 cdj.tsv
to get the first line. Now I want number of unique words in this line. How can I get that?
Result of the command head -n 1 cdj.tsv
looks like:
Country China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China China Denmark Denmark Denmark Denmark Denmark DenmarkDenmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark DenmarkDenmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark DenmarkDenmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark DenmarkDenmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark Denmark DenmarkDenmark Denmark
So, I want the output to be 3 (for Country, China and Denmark).
Thanks