Vimium Search Engine

vimium_search_engine.js

(function (query) {
  engines = {
    'g' : function (q) { return 'https://www.google.com/search?q=' + q },
    'd' : function (q) { return 'https://duckduckgo.com/?q=' + q },
    'y' : function (q) { return 'http://search.yahoo.com/search?p=' + q },
    'w' : function (q) { return 'http://en.wikipedia.org/wiki/' + q }, 
    't' : function (q) { return 'https://twitter.com/search?q=' + q },
    'b' : function (q) { return 'http://www.bing.com/search?q=' + q },
  };
  defEngine = Object.keys(engines)[0];
  first = query.split('%20')[0];
  args = query.slice(first.length + 3);
  openurl = first in engines ? engines[first](args)
                             : engines[defEngine](query);
  window.open(openurl, '_self');
})('%s')