From: Daniel Mitchell (danmitchell_at_[hidden])
Date: 2006-04-16 23:37:03
On Saturday 15 April 2006 15:25, Irek Szczesniak wrote:
> In nutshell: how can I check whether a property map has some given
> key?
Some property maps may provide bounds checking, but the property map concept
doesn't require it, so in general you can't.
>
> graph {
> a;
> b;
> c;
> c -- a [distance="100"];
> a -- b [lambdas="8"];
> }
>
I think you'll need to give every edge a lambda number, but you might reserve
a special value to indicate that the lambda property isn't applicable to that
edge.
Daniel