cayley.js

function getInRange(origin_id, range, ret){
  if( range > 0 ){
    g.V(origin_id).Both("gate_to").ForEach(function(n){
      var system_name = g.V(n["id"]).Out("name").ToValue();
      
      if( ret.indexOf(system_name) == -1 ){
        ret.push( system_name )
        getInRange(n["id"], range - 1, ret)
      }
    })
  }
}


var node_id = g.V("SystemA").In("name").ToValue()
ret = []
getInRange( node_id, 1, ret)
g.Emit({"ret" : ret.sort()})