redis zunionstore dynamically pass the sets

Question

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?

score 2 · Accepted Answer · edited May 23 '17 at 10:25

2

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).

edited May 23 '17 at 10:25

Community

1
1

answered Apr 30 '13 at 16:15

akonsu

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Thanks it worked, i just had to change the context to client instead of this :) – Captain Obvious May 02 '13 at 06:42

redis zunionstore dynamically pass the sets

1 Answers1