String filter(String[] args, boolean include) {
verifyCommand(args, String.format(_filterHelp, args[0]), null, 3, 3);
Collection<String> list = new ArrayList<String>(Processor.split(args[1]));
Pattern pattern = Pattern.compile(args[2]);
for (Iterator<String> i = list.iterator(); i.hasNext(); ) {
if (pattern.matcher(i.next()).matches() == include) i.remove();
}
return Processor.join(list);
}
