access to list of complement records

[deanmalmgren]

I mentioned this on StackOverflow and think this could be a nice addition to the crossfilter library. I have a use case where I'd like to get all of the non-matching records from a crossfilter selection and do something with them.

As a concrete example, I have an image where I would like a user to be able to select a region of the RGB distribution and make all non-matching pixels transparent. I've set up crossfilter+d3 to visualize the RGB distribution on three separate axes, but I'm using Caman.js to render/manipulate the image.

@jasondavies suggested a good workaround for this but perhaps we could bake this into crossfilter itself?

[RandomEtc]

Thanks for your contributions and sorry for silence on this side. As discussed in #151 an active fork is being developed in a new Crossfilter Organization. Please take further discussion there (if you haven't already) where it should be warmly welcomed by the new maintainers. Cheers!