If your user are not in a particular order, add to this: don't use an
array if there is no order, but a hash (object).
users = {};
e.g. with adding a user by: users[id] = {|somenewuserdata|};
In that case getting a new user is easy as:
exports.get_user = function(id, func) {
func(users[id] ? null : "NOT_FOUND", users[id] || null);
}
I wonder, why you need a callback after all? Its not an IO operation
with a delay. If not needed due to overall structure or so, it gets
even simpler:
exports.get_user = function(id) {
return users[id] || null;
}
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