 
 class DuckDuckGo extends RegexpEngine
   # Example search URL: https://duckduckgo.com/?q=%s
-  constructor: -> super new RegExp "^https?://([a-z]+\.)?duckduckgo\.com/"
-  getUrl: (queryTerms) ->
+  constructor: -> super "^https?://([a-z]+\.)?duckduckgo\.com/"
   getUrl: (queryTerms) -> Utils.createSearchUrl queryTerms, "https://duckduckgo.com/ac/?q=%s"
   parse: (xhr) ->
     suggestion.phrase for suggestion in JSON.parse xhr.responseText
 
 class Webster extends RegexpEngine
   # Example search URL: http://www.merriam-webster.com/dictionary/%s
-  constructor: -> super new RegExp "^https?://www.merriam-webster.com/dictionary/"
+  constructor: -> super "^https?://www.merriam-webster.com/dictionary/"
   getUrl: (queryTerms) -> Utils.createSearchUrl queryTerms, "http://www.merriam-webster.com/autocomplete?query=%s"
   parse: (xhr) -> JSON.parse(xhr.responseText).suggestions
 


class Bing extends RegexpEngine
  # Example search URL: https://www.bing.com/search?q=%s
  constructor: -> super new RegExp "^https?://www\.bing\.com/search"
  getUrl: (queryTerms) -> Utils.createSearchUrl queryTerms, "http://api.bing.com/osjson.aspx?query=%s"
  parse: (xhr) -> JSON.parse(xhr.responseText)[1]

class Amazon extends RegexpEngine
  # Example search URL: http://www.amazon.com/s/?field-keywords=%s
  constructor: -> super new RegExp "^https?://www\.amazon\.(com|co.uk|ca|com.au)/s/"
  getUrl: (queryTerms) ->
    Utils.createSearchUrl queryTerms,
      "https://completion.amazon.com/search/complete?method=completion&search-alias=aps&client=amazon-search-ui&mkt=1&q=%s"

# then strip "map of" from the resulting suggestions.
class GoogleMaps extends GoogleWithPrefix
  # Example search URL: https://www.google.com/maps?q=%s
  constructor: -> super "map of", "https?://[a-z]+\.google\.(com|ie|co\.uk|ca|com\.au)/maps"

class Youtube extends GoogleXMLRegexpEngine
  # Example search URL: http://www.youtube.com/results?search_query=%s
  constructor: ->
    super "^https?://[a-z]+\.youtube\.com/results"

  getUrl: (queryTerms) ->
    Utils.createSearchUrl queryTerms,
