Question

I need a collection that is like a set. Basically I’m scanning a long string and adding words to the collection but I want to be able to detect when there are duplicates.

If sets aren’t available, what’s the most efficient way of doing this in Ruby? Brownie points for example code.

Answer 1

From the documentation:

a = [ 'a', 'a', 'b', 'b', 'c' ] a.uniq  #gets you   ['a', 'b', 'c'] a.uniq.uniq! #gets you nil (no duplicates :)