Open tabs with mtg cards

#!/usr/bin/env ruby

def urls_for_card(card)
  card_dash = card.downcase.gsub(/[ ,]+/, "-").gsub("'", "")
  card = card.gsub(" ", "+")
  urls = [
    "http://www.magicmadhouse.co.uk/search/#{card_dash}",
    "http://www.bazaargames.co.uk/Store/advanced_search_result.php?keywords=#{card}",
    "http://www.magicgeek.co.uk/advanced_search_result.php?keywords=#{card}",
    "http://scrolltrader.com/catalogsearch/advanced/result/?name=#{card}",
    "http://www.firestormcards.co.uk/SearchResults.aspx?catID=0&CatName=All%20Categories&Strname=#{card}",
    "http://www.koolkingdom.co.uk/cgi-bin/ss000001.pl?page=search&SS=#{card}&S_KoolKingdomSearchable0_8=Yes&PR=-1&TB=A",
    "http://www.manaleak.com/store/advanced_search_result.php?search_in_description=1&inc_subcat=1&sort=3d&keywords=#{card}",
    "http://www.trolltradercards.com/products/search?query=#{card}",

    # Too expensive too consistently to bother:
    # "http://www.psi-soft.co.uk/advanced_search_result.php?keywords=#{card}&x=0&y=0",
    # "http://www.patriotgamesleeds.com/index.php?main_page=advanced_search_result&search_in_description=1&keyword=#{card}",

    # For comparison:
    # "https://www.magiccardmarket.eu/?mainPage=showSearchResult&searchFor=#{card}",
    # "http://shop.ebay.co.uk/i.html?rt=nc&LH_BIN=1&_nkw=#{card}&&_sop=15",

    # I don't remember why disabled, old stuff:
    # "http://www.thecardcellar.co.uk/advanced_search_result.html?keyword=#{card}",
    # "http://themagicbox.co.uk/index.php?route=product/search&keyword=#{card}",
    # "http://www.noottshovelofgames.co.uk/advanced_search_result.php?keywords=#{card}",
    # "http://silverbacksmonkeyhouse.co.uk/index.php?searchStr=#{card}&_a=viewCat&Submit=Go",
  ]
end

urls = ARGV.map{|card| urls_for_card(card)}.flatten

if File.exist?("/Applications/Opera.app/Contents/MacOS/Opera")
  system "/Applications/Opera.app/Contents/MacOS/Opera", *urls
else
  system "opera", "--remote", *urls
end