gistfile1.txt

@count = @entries.map(&:type).each_with_object(Hash.new(0)) { |type, hash| hash[type] += 1 }
=> 
{
  #<Type:0x00007fd3a9a4f810 id: 4, title: "Events", created_at: Mon, 19 Aug 2019 18:22:02 UTC +00:00, updated_at: Mon, 19 Aug 2019 18:22:02 UTC +00:00, slug: "events">=>2,
  #<Type:0x00007fd3a38f6cd0 id: 10, title: "Topic", created_at: Mon, 19 Aug 2019 18:22:02 UTC +00:00, updated_at: Mon, 19 Aug 2019 18:22:02 UTC +00:00, slug: "topic">=>1,
  #<Type:0x00007fd3a7b2f4e0 id: 5, title: "Restaurants", created_at: Mon, 19 Aug 2019 18:22:02 UTC +00:00, updated_at: Mon, 19 Aug 2019 18:22:02 UTC +00:00, slug: "restaurants">=>2,

 }
 
How can I remove any Type that has title of Topic ?

@count = @entries.reject { |entry| entry.title == "Topic" }.map(&:type).each_with_object(Hash.new(0)) { |type, hash| hash[type] += 1 }

Technically you could do it this way ☝️, but if @entries is an ActiveRecord::Relation, then I'd recommend doing it at the model layer.

class Entry < ApplicationModel
  # surely there's a better name in your domain for things that 
  # aren't "Topic"—the reason you're excluding it.
  scope :not_topic, -> { where.not(title: 'Topic') }
end

count = @entries.not_topic.each_with_object(Hash.new(0)) { |type, hash| hash[type] += 1 }