Here, I want to get a PR via API and then get the issue contents

no_url_help.rb

pull_response = RestCall.get("/repos/bob/rails8/pulls")
issue_response = RestCall.get("/repos/bob/rails8/issues/#{response.first['issue']}")
# either of these might 404

with_url_help.rb

pull_response = RestCall.get("/repos/bob/rails8/pulls")
issue_response = RestCall.get(pull_response.first["issue_url"]) # => oops, what if response is empty?

if pull_response.present?
  issue_response = RestCall.get(pull_response.first["issue_url"]) # => oops, what if response issue_url isn't there?
end

if pull_response.present? && pull_response.first["issue_url"].present?
  issue_response = RestCall.get(pull_response.first["issue_url"]) # OK!
end