redis-scan.js

var Promise = require('bluebird'),
    redis = require('redis');

var db = redis.createClient();
Promise.promisifyAll(Object.getPrototypeOf(redis), { suffix: '$' });

function _scan(cmd, key) {
    function recurse(ttl, cur) {
        return cmd(key, cur).then(function (cur, val) {
            if (cur) {
                ttl.push(val);
                return recurse(ttl, cur);
            }
            return ttl;
        });
    };
    return recurse([], 0);
};
function scan  = _scan.bind(null, db.scan$.bind(db));
function sscan = _scan.bind(null, db.sscan$.bind(db));
function lscan = _scan.bind(null, db.lscan$.bind(db));
function hscan = _scan.bind(null, db.hscan$.bind(db));