Simplfied dojo.query wrapper to provide streamlined support for the :eq() pseudo-selector

domQuery.js

function domQuery(selector, scopeNode){
  // summary: 
  //    Wrap dojo.query to provide support for the :eq() pseudo-selector
  //    See: http://api.jquery.com/eq-selector/

  var reEqPseudo = /:eq\((\d+)\)/, 
    results = new dojo.NodeList;

  scopeNode = scopeNode || dojo.doc.documentElement;

  if(typeof selector !== "string" || !reEqPseudo.test(selector)){
    return dojo.query(selector, scopeNode);
  }

  var sel = selector,
    idx, leftContext, selectorScope = scopeNode, 
    subResults = null,
    subQueries = [];

  // break query into sub-queries to handle the eq()
  for(var arMatch = null;
      (arMatch = reEqPseudo.exec( sel ));
      sel = dojo.trim(RegExp.rightContext)
  ){
    if(arMatch){
      idx = arMatch[1];
      leftContext = RegExp.leftContext;
      subQueries.push([leftContext, idx]);
    } else {
      break;
    }
  }
  if(RegExp.rightContext){
    subQueries.push([RegExp.rightContext, -1]);
  }
  dojo.forEach(subQueries, function(pair){
    var sel = pair[0], 
      idx = parseInt(pair.length >= 2 ? pair[1] : -1, 10);

    subResults = oldQuery.apply(dojo, [sel, selectorScope]);
    // console.log("subquery: ", sel, selectorScope, subResults);
    if(idx >= 0){
      selectorScope = subResults[idx];
      subResults = new dojo.NodeList(selectorScope);
    } else {
      // leave subResults as its stands
    }
  });
  results = results.concat(subResults);
  // return aggregated results (dojo.NodeList instance)
  return results;
};