gistfile1.js

          for (var i=0; i < slides.length; i++) {
            var slide = slides[i];
            redis.incr("ids::slides", function(err, sid) {
              console.log("we've incremented sid to " + sid);
              redis.set("slide:"+sid, slide, function(err, ok) {
                console.log("Adding slide " + "slide:"+sid + " with score " + i);
                redis.zadd(key, i, "slide:"+sid);
              });
            });
          }