Arrow on edges in forceDirectedGraph

[bobewightman]

With a forceDirectedGraph is there a way to marker arrows just pointing in one direction? I.e. like ---> . If I set edgeLineDirected: true then I get an arrow at both ends of the edge: <----->. Obviously with the property set to false then no arrows appear.

My nodes represent individuals and the edges represent help given so if A helped B but not reciprocally then the edge would look like: A ----> B. If A had helped B, AND B had helped A then A <---> B

[bobewightman]

Found the answer - the code was creating the links in both directions so A -> B and B -> A! I removed the offending line and all is well