Re: [go-nuts] len error on pointers to maps

[David Symonds]

You almost certainly don't want a map pointer. Maps are reference types already.

[Kevin Gillette]

See <http://blog.golang.org/2011/01/go-slices-usage-and-internals.html>. The nature of map and channel "values" are very similar to slices. You can't produce a copy of the map data itself just by assigning it to another variable.