{"action":"created","comment":{"url":"https://api.github.com/repos/jmmastey/level_up_exercises/pulls/comments/34279553","id":34279553,"diff_hunk":"@@ -0,0 +1,56 @@\n+require 'abanalyzer'\n+\n+class DataManager\n+  @sample_size = 0\n+  attr_accessor :reader\n+  def load(reader)\n+    @reader = reader\n+  end\n+\n+  def sample_size(cohort_name = nil)\n+    raise ArgumentError, \"reader not initialized\" if @reader.nil?\n+    if cohort_name.nil?\n+      @reader.data_hash.count\n+    else\n+      @reader.data_hash.count { |item| (item['cohort']) == cohort_name }\n+    end\n+  end\n+\n+  def conversion_size(cohort_name = nil)\n+    raise ArgumentError, \"reader not initialized\" if @reader.nil?\n+    if cohort_name.nil?\n+      @reader.data_hash.count { |item| (item['result']) == 1 }\n+    else\n+      cohort_conversion_size(cohort_name)\n+    end\n+  end\n+\n+  def cohort_conversion_size(name)\n+    @reader.data_hash.count do |item|\n+      (item['cohort']) == name && (item['result'] == 1)\n+    end\n+  end\n+  private :cohort_conversion_size","path":"data_science/lib/data_manager.rb","position":33,"original_position":33,"commit_id":"70beddc66ea54051f67a13da1fe1aa89535f984c","original_commit_id":"70beddc66ea54051f67a13da1fe1aa89535f984c","user":{"login":"djkotowski","id":2326295,"avatar_url":"https://avatars.githubusercontent.com/u/2326295?v=3","gravatar_id":"","url":"https://api.github.com/users/djkotowski","html_url":"https://github.com/djkotowski","followers_url":"https://api.github.com/users/djkotowski/followers","following_url":"https://api.github.com/users/djkotowski/following{/other_user}","gists_url":"https://api.github.com/users/djkotowski/gists{/gist_id}","starred_url":"https://api.github.com/users/djkotowski/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/djkotowski/subscriptions","organizations_url":"https://api.github.com/users/djkotowski/orgs","repos_url":"https://api.github.com/users/djkotowski/repos","events_url":"https://api.github.com/users/djkotowski/events{/privacy}","received_events_url":"https://api.github.com/users/djkotowski/received_events","type":"User","site_admin":false},"body":"Prefer 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