blank_or - View helper to render blank text if a value is blank, or ...

application_helper.rb

def blank_or(attribute, blank_text: "N/A", blank_test: :blank?)
  if attribute.send(blank_test)
    return blank_text
  else
    return yield(attribute) if block_given?
    return attribute
  end
end

view.html.slim

table.table.table-striped
  thead
    tr
      th Name
      th Email
      th Last Logged In At
  tbody
    - @user.each do |user|
      tr
        td= user.name
        td= user.email
        td= blank_or(user.last_logged_in_at) { |time| time.stamp("1:32PM 12/31/99") }