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From Tom Sante <tom.sa...@gmail.com>
Subject Re: Reduce function results
Date Thu, 20 May 2010 23:56:56 GMT
On 20/05/10 23:52, David Goodlad wrote:
> On Thu, May 20, 2010 at 9:38 PM, Tom Sante<tom.sante@gmail.com>  wrote:
>> Hi,
>>
>> I have a reduce function like this:
>> [snip]
>> So for some reason if there is only 1 element to be reduced, on the line of
>> res[v_n]={'mi':v,'ma':v,'c':1,'t':v};
>> v becomes v={} and not the actual number. Any ideas why?
>>
>> I tested the reduce function with the command line 'js' and send it the
>> above test keys manually as function argument and then it does result in the
>> correct return:
>> "01:00:000074" ->  {raw: {mi: -0.213, ma: -0.213, c: 1, t: -0.213}}
>> "01:00:000084" ->  {raw: {mi: -0.213, ma: -0.213, c: 1, t: -0.213}}
>
> Sounds like you need to specify group_level; Try playing around in
> Futon, you'll see a group_level dropdown.
>
> Dave

Why would I need a group_level parameter?
My key is a simple string "01:00:000074".
Its my values don't get correctly generated by couchjs, since it does 
out but proper values in normal commandline js.

         var v = new Number(values[val][v_n]);
         if(res.hasOwnProperty(v_n)){
             res[v_n].mi = Math.min(v,res[v_n].mi);
             res[v_n].ma = Math.max(v,res[v_n].ma);
             res[v_n].c++;
             res[v_n].t += v;
         }else{
             res[v_n]={'mi':v,'ma':v,'c':1,'t':v};
         }

It seems that in the above part in the 'else' case the v isn't a number 
but an empty object {}

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