Question

Currently, I’m doing this:

(in initialize)
 @all = Stuff.all.each.map {|t| t.reference_date }
 @uniques = @all.uniq



results = []
@uniques.each do |k|
  i = 0
  @all.each do |x|
    i += 1 if x =~ %r{#{x}}
  end
  results << [k, i]
end

And that’s fine. It’s going to work. But I like to avoid regular expressions when I can. I think they are a bit feo. That’s spanish for ugly.

EDIT–
actually, that’s not working because ruby “puts” the date as a numbered format like 2012-03-31 when the date object is placed inside of a string (as a variable, here), but its really a date object, so this worked:

if x.month == k.month && x.day == k.day
  i += 1
end

Answer 1

You can do it with just 1 line (if I got right the question of course):

array = %w(a b c d a b d f t z z w w)
# => ["a", "b", "c", "d", "a", "b", "d", "f", "t", "z", "z", "w", "w"]
array.uniq.map{|i|[i, array.count(i)]}
# => [["a", 2], ["b", 2], ["c", 1], ["d", 2], ["f", 1], ["t", 1], ["z", 2], ["w", 2]]