NodeBB/node_modules/redis/examples/eval.js

var redis = require("../index"),
    client = redis.createClient();

redis.debug_mode = true;

client.eval("return 100.5", 0, function (err, res) {
    console.dir(err);
    console.dir(res);
});

client.eval([ "return 100.5", 0 ], function (err, res) {
    console.dir(err);
    console.dir(res);
});