I use this form of reduce to group by key the results.
In the real life, I use this reduce to get all tag group by document id.
Something like that :
function(doc){
if(doc.doc_type == "MyDoc"){
for( var t in doc.tags){
emit(doc.name, doc.tags[t]);
}
}
}
and the reduce :
function(key, values){
return values;
}
I get the following result:
name1 = > ["tag1", "tag2", "tag3"]
name2 => ["tag2", "tag3"]
but sometime I get this result
name1 = [["tag1","tag2","tag3"],["tag4","tag5","tag6","tag7"],["tag8","tag9"]]
Note that if the view work well the first time, it will always work fine.
It is the correct way to go ?
On Sat, Mar 28, 2009 at 12:10 PM, Sven Helmberger
<[email protected]> wrote:
> Nicolas Clairon schrieb:
>>
>> Nop !
>>
>> Here is the test map function :
>>
>> function(doc){
>> emit("key", 1);
>> }
>>
>> and the reduce function:
>>
>> function(key, values){
>> return values;
>> }
>>
>> That work well for a large usecase but sometime, I get this strange
>> behavior...
>>
>
> What purpose does the reduce function have? it doesn't really reduce or
> combine anything so it seems like it could just as well be left out.
>
> Regards,
> Sven Helmberger
>
