Ruby: How to group a Ruby array?

Question

I have a Ruby array

> list = Request.find_all_by_artist(\"Metallica\").map(&:song)
=> [\"Nothing else Matters\", \"Enter sandman\", \"Enter Sandman         


        

Answer 1

Late but clean answer I have,

l = list.group_by(&:titleize)
l.merge(l) { |k,v| l[k] = v.count }

Note: If we do want unique keys i.e. without titleize, then replace it with itself