oh i was confused by the function signature... Though well why not. In a pure M/r (which we are not any way) i would forbid that,but for someone that want to use maps as a way to provide transformed docs while keeping the original doc, why not.... . Until we are providing sane defaults.
- benoit On Wed, Nov 13, 2013 at 4:59 PM, Robert Newson <[email protected]> wrote: > Benoit, the code that makes an http call then uses the result in an > emit() call, which only makes sense as part of a map function. > > B. > > > On 13 November 2013 15:57, Benoit Chesneau <[email protected]> wrote: > > On Wed, Nov 13, 2013 at 4:50 PM, Robert Newson <[email protected]> > wrote: > > > >> what Jens said. We prevent this deliberately. Crowbar it back in at > >> your own risk. > >> > >> B. > >> > > > > The code pasted in the initial mail isn't about map/reduce but a show. > Imo > > if the user want to take more risk I don't see why not if it's feasible > > technically without introducing any changes to the defaults ;) Especially > > in shows and list. There are a lot of good reason to do that. we could > even > > provides some limitation on what could be cal there if i red the > action.js > > from 2008 well. > > > > - benoit > > > > > > > >> > >> > >> On 13 November 2013 15:45, Jens Alfke <[email protected]> wrote: > >> > > >> > On Nov 13, 2013, at 4:48 AM, Hank Knight <[email protected]> > wrote: > >> > > >> >> function(doc, req) { > >> >> var http = new XMLHttpRequest(); > >> >> http.open( "GET", "http://www.w3schools.com/xml/note.xml";, false > ); > >> >> http.send( null ); > >> >> emit("xyz",http.responseText); > >> >> } > >> > > >> > Wait, is that supposed to be a map function? Whether or not this is > >> technically feasible, it’s an incorrect use of map/reduce. > >> > > >> > It’s critical that a map function be a ‘pure' function with no access > to > >> outside state. That is, every time the function is called with the same > >> input, it must produce the same output. Otherwise you won’t get a > >> self-consistent index. > >> > > >> > —Jens > >> >
