redis zunionstore dynamically pass the sets

Question

redis zunionstore dynamically pass the sets

I want to use the zunionstore command on sets which i define at runtime, they are fetched dynamically so i never know what the sets are that i have to pass to the function.

syntax of zunionstore:

ZUNIONSTORE destination numkeys key [key ...] [WEIGHTS weight [weight ...]] [AGGREGATE SUM|MIN|MAX]

the parsed array contains the names of the sets.

client.zunionstore
        (
            'out',                
            parsed.length,
            parsed,
            function (err, res)
            {
                console.log(err); 
                if(!err)
                {
                    client.zrevrange('out', 0, -1, 'withscores', function (err, res)
                    {
                        console.log(res);
                        if(!err)
                        {
                            //do stuff
                        }
                    });                          
                }
            }
        );

as you can see i tried to pass the array containing the names but this doesn't work..

the error i get:

[Error: ERR syntax error]

Any ideas on how to solve this?

javascript
node.js
redis
runtime

Answer 1

do you mean that you are having problems passing an array to a function? put all arguments into an array and call apply on the function: Passing an array as a function parameter in JavaScript

so, you have your parsed array, just add to it the other things like your 'out', parsed.length, etc, and call client.zunionstore.apply(this, array).