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MAP REDUCE using couchdb

https://wiki.apache.org/couchdb/Introduction_to_CouchDB_views

http://guide.couchdb.org/draft/views.html

  • If you don’t use the key field in the map function, you are probably doing it wrong.
  • If you are trying to make a list of values unique in the reduce functions, you are probably doing it wrong.
  • If you don’t reduce your values to a single scalar value or a small fixed-sized object or array with a fixed number of scalar values of small sizes, you are probably doing it wrong.
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