code: public static HashMap<Integer, Double> readIntDoubleMapFromGlob(Path glob, FileSystem fs)
  	    throws IOException {
  		FileStatus status[] = fs.globStatus(glob);
  		HashMap<Integer, Double> ret = new HashMap<Integer, Double>();
  		for(FileStatus fileS : status) {
  			ret.putAll(readIntDoubleMap(fileS.getPath(), fs));
  		}
  		return ret;
  	}
docs: Reads maps of integer -> double from glob paths like "folder/part-r*"