Ted,
What you've simulated in your sequence is the creation of sibling objects. The
example assumes the object only has a single value (no siblings) - which means
it will only extract the first one, which is why you got only [{bread,2}].
Sean Cribbs <[email protected]>
Developer Advocate
Basho Technologies, Inc.
http://basho.com/
On May 10, 2010, at 11:06 AM, Ted Karmel wrote:
> Hi,
>
> I am following the Erlang Map Reduce example found here:
> https://wiki.basho.com/display/RIAK/MapReduce#MapReduce-MapReduceviatheErlangAPI
>
> I completed the example successfully with the intended result.
>
> But, initially, I received an unintended result when creating a
> separate object for each value:
>
>> O0 = riak_object:new(<<"groceries">>, <<"mine">>, ["bread"]).
>> Client:put(O0, 1).
>> O1 = riak_object:new(<<"groceries">>, <<"mine">>, ["cheese"]).
>> Client:put(O1, 1).
>> O2 = riak_object:new(<<"groceries">>, <<"yours">>, ["bread"]).
>> Client:put(O2, 1).
>> O3 = riak_object:new(<<"groceries">>, <<"yours">>, ["butter"]).
>> Client:put(O3, 1).
>
> The result was:
>
>> [{"bread", 2}]
>
> and not
>
>> [{"cheese", 1}, {"bread", 2}, {"butter", 1}]
>
> My question is WHY is there a difference? If you enter multiple
> values via multiple objects for the same bucket and key, do the map
> reduce functions not operate over all of the values?
>
> Any insights much appreciated.
>
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