Examples of com.google.gwt.query.client.Properties.keys()

   * TODO: jquery implementation accepts a second parameter (traditional)
   */
  public static String param(JavaScriptObject js) {
    Properties prop = js.cast();
    String ret = "";
    for (String k : prop.keys()) {
      ret += ret.isEmpty() ? "" : "&";
      JsCache o = prop.getArray(k).cast();
      if (o != null) {
        for (int i = 0, l = o.length(); i < l ; i++) {
          ret += i > 0 ? "&" : "";

      // This is a very basic implementation for IE6/IE7 of JSON.stringify
      // If many people demand a better one we could consider to use json2.js
      // @see https://github.com/douglascrockford/JSON-js/blob/master/json2.js
      Properties prop = js.cast();
      String ret = "";
      for (String k : prop.keys()){
        String ky = k.matches("\\d+") ? k : "\"" + k + "\"";
        JsCache o = prop.getArray(k).cast();
        if (o != null) {
          ret += ky + ":[";
          for (int i = 0, l = o.length(); i < l ; i++) {

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