var substringMatcher = function(strs) {
  return function findMatches(q, cb) {
    var matches, substringRegex;
 
    // an array that will be populated with substring matches
    matches = [];
 
    // regex used to determine if a string contains the substring `q`
    substrRegex = new RegExp(q, 'i');
 
    // iterate through the pool of strings and for any string that
    // contains the substring `q`, add it to the `matches` array
    $.each(strs, function(i, str) {
      if (substrRegex.test(str)) {
        // the typeahead jQuery plugin expects suggestions to a
        // JavaScript object, refer to typeahead docs for more info
        matches.push({ value: str });
      }
    });
 
    cb(matches);
  };
};

var tracks = ["","AIKEN","AJAX DOWNS","ALBUQUERQUE","ARLINGTON","AQUEDUCT","ARAPAHOE","ASSINIBOIA","ATLANTA","BROWN COUNTY","BELMONT PARK","BLACK FOOT","LES BOIS PARK","HARNEY COUNTY FAIR","BELTERRA PARK","CAMDEN","CASSIA FAIR","CANTERBURY PARK","CHURCHILL DOWNS","CHARLOTTE","COLUMBUS","CAMARERO","CHIPPEWA DOWNS","CHARLES TOWN","DELTA DOWNS","DELAWARE PARK","DEL MAR","ELKO FAIR","ELLIS PARK","WHITE PINE RACING","EMERALD DOWNS","EMMETT","EVANGELINE","FAIR HILL","FORT ERIE","FERNDALE","FAIR GROUNDS","FAR HILLS","FINGER LAKES","FAIR MEADOWS","FONNER PARK","FAIRMOUNT PARK","FAIR PLAY PARK","FORT PIERRE","FOXFIELD","GREAT FALLS","GOLDEN GATE","GILLESPIE FAIRGROUND","GLYNDON","GRAND NATIONAL","GULFSTREAM PARK","GRANDE PRAIRIE","GREAT MEADOW","GRANTS PASS","GENESEE VALLEY","HAWTHORNE","HIALEAH PARK","SAM HOUSTON","HAZEL PARK","HORSEMEN'S PARK","HASTINGS","INDIANA GRAND RACE COURSE","JEROME FAIR","KENTUCKY DOWNS","KEENELAND","LOS ALAMITOS QUARTER HORSE","LOUISIANA DOWNS","LETHBRIDGE","LEXINGTON","LOS ALAMITOS THOROUGHBRED","LAUREL PARK","LONE STAR","MALVERN","MILES CITY","MARQUIS DOWNS","MEADOWLANDS","MIDDLEBURG","MILLARVILLE","MOUNTAINEER","MONKTON","MONMOUTH PARK","MAHONING VALLEY RACE COURSE","NORTHLANDS PARK","ONEIDA FAIR","OAKLAWN PARK","OCALA TRAINING CTR","OAK TREE AT PLEASANTON","PENN NATIONAL","PRESQUE ISLE DOWNS","PIMLICO","PORTLAND MEADOWS","PINE MTN","POCATELLO DOWNS","PRAIRIE MEADOWS","CROOKED RIVER","PARX RACING","PERCY WARNER","RETAMA PARK","RILLITO","REMINGTON PARK","RUIDOSO DOWNS","MINIDOKA FAIR","SANTA ANITA","SACRAMENTO","SARATOGA","SANDY DOWNS","SHAWAN DOWNS","SANTA CRUZ","SANTA ROSA","SUNRAY PARK","STOCKTON","STONEYBROOK","SUN DOWNS","SUNLAND PARK","SWEETWATER DOWNS","TAMPA BAY","THISTLEDOWN","TURFWAY PARK","TRYON","TURF PARADISE","OREGON LIVESTOCK","PENNSYLVANIA HUNT CUP","WILLOWDALE STP","WINTERTHUR","WOODBINE","WILL ROGERS","WYOMING DOWNS","ZIA PARK"];

$('.tracks.typeahead').typeahead({
  hint: true,
  highlight: true,
  minLength: 1
},
{
  name: 'tracks',
  displayKey: 'value',
  source: substringMatcher(tracks)
});