What Javascript Functions Are Available In The Couchdb Map And Reduce View Functions?

When writing map and reduce view functions for CouchDB in JavaScript, what are the build-in functions available? For example, various examples refer to the following 2 functions: e

Solution 1:

I don't know the CouchDB internals, however, from reading the sources, it looks like the map functions are evaluated in the sandbox created by init_sandbox(). So the available "global" functions are the ones you see added to it. For example:

• require()
• log()
• isArray()
• sum()
• ...

_sum and _count, instead, are built-in reduce functions written in Erlang, and you can only use them as-is.

Solution 2:

Well first: not CacheDB but CouchDB (header). Second: these are not built-in Javascript functions - these are just built-in functions which work in Erlang. As far as i know there are only _sum and _count functions available.