application_helper.rb

def rhost(www = nil)
  if request.host != "www#{env_dev}.a.a"
    request.host.gsub(/^w+(|\d+)\./, "").gsub(/\.a\.a/, "")
  elsif www == 1 && request.host == "www#{env_dev}.a.a"
    'www'
  elsif www == 2
    'test'
  else
    nil
  end
end

test.coffee.erb

$(document).on 'turbolinks:load', ->
  $(".company.contacts").ready ->
    init = ->
      myMap = []
      alert('<%= rhost %>')
      #alert(window.location.href)
      for x in [1..<%= I18n.translate("office.maps").size %>]
        if x == 1
          <% i = 1 %>
          lat = '<%= I18n.translate("office.branches.n_#{i}.pos.lat") %>'
          lon = '<%= I18n.translate("office.branches.n_#{i}.pos.lon") %>'
        else if x == 2
          <% i = 2 %>
          lat = '<%= I18n.translate("office.branches.n_#{i}.pos.lat") %>'
          lon = '<%= I18n.translate("office.branches.n_#{i}.pos.lon") %>'
        else if x == 3
          <% i = 3 %>
          lat = '<%= I18n.translate("office.branches.n_#{i}.pos.lat") %>'
          lon = '<%= I18n.translate("office.branches.n_#{i}.pos.lon") %>'
        else
          <% i = 4 %>
          lat = '<%= I18n.translate("office.branches.n_#{i}.pos.lat") %>'
          lon = '<%= I18n.translate("office.branches.n_#{i}.pos.lon") %>'

        myMap[x] = new (ymaps.Map)('ada_map_'+x,
          center: [
            lat
            lon
          ]
          zoom: 16
          controls: [
            'zoomControl',
            'trafficControl',
            'typeSelector',
            'rulerControl'
            ]
          behaviors: [
          ])

      myMap = []
      for y in [1..<%= I18n.translate("office.maps").size %>]
        ymaps.geoXml.load('//maps.yandex.ru/export/usermaps/apzSHv3t12Ao6m6pQg0HqVw-huQ5xQWV/').then ((res) ->
          myMap[y].geoObjects.add res.geoObjects
          return
        )
    ymaps.ready init