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From Apache Wiki <>
Subject [Couchdb Wiki] Update of "Introduction to CouchDB views" by RobertNewson
Date Sun, 30 Aug 2009 17:08:24 GMT
Dear Wiki user,

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The following page has been changed by RobertNewson:

The comment on the change is:
add anchor to reduce functions

+ [[Anchor(reduce_functions)]]
  === Reduce Functions ===
  If a view has a reduce function, it is used to produce aggregate results for that view.
A reduce function is passed a set of intermediate values and combines them to a single value.
Reduce functions must accept, as input, results emitted by its corresponding map function
'''as well as results returned by the reduce function itself'''. The latter case is referred
to as a ''rereduce''.

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