Sets in Ruby?
There is a Set class in ruby. You can use it like so:
require 'set'set = Set.newstring = "a very very long string"string.scan(/\w+/).each do |word| unless set.add?( word ) # logic here for the duplicates endendAlthough, I'm wondering if you would want to count the instances in that case the following example would be better:
instances = Hash.new { |h, k| h[k] = 0 }string.scan(/\w+/).each do |word| instances[word] += 1end
From the documentation:
a = [ "a", "a", "b", "b", "c" ]a.uniq #gets you ["a", "b", "c"]a.uniq.uniq! #gets you nil (no duplicates :)