My take:<br><br><br>{Mod, Pid} = if<br>    Value == "state";<br>    Value == "rx_bit_rate";<br>    Value == "tx_bit_rate";<br>    Value == "ebno" -><br>        {circuit_monitor, CircuitMonitorPid};

Value == "packet_loss";     Value == "round_trip_time" ->         {node_pinger, NodePingerPid} end, ?D, Mod:plot_node_value(Pid, Socket, RequestId, CircuitId, FromDateTime, ToDateTime, Width, Height, Value).

<br><br><br><div class="gmail_quote">On Dec 4, 2007 10:23 PM, David Mercer <<a href="mailto:dmercer@gmail.com">dmercer@gmail.com</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">

How about:<br><br>        Mod = (case Value of<br>                "state"       -> circuit_monitor;<br>                "rx_bit_rate" -> circuit_monitor;<br>                "tx_bit_rate" -> circuit_monitor;

<br>                "ebno"        -> circuit_monitor;<br>                "packetloss"  -> node_pinger;<br>                "rtt"         -> node_pinger<br>                end),<br>        Pid = (if Mod = circuit_monitor -> CircuitMonitorPid; true ->

<br>NodePingerPid),<br>        Mod:plot_node_value(Pid, Socket,<br><div class="Ih2E3d">                                RequestId, CircuitId, FromDateTime,<br>ToDateTime, Width, Height, Value<br>                        )<br>

<br></div>I'm not sure if that's any prettier, though...<br><br>DBM<br><div><div></div><div class="Wj3C7c"><br>-----Original Message-----<br>From: <a href="mailto:erlang-questions-bounces@erlang.org">erlang-questions-bounces@erlang.org

</a><br>[mailto:<a href="mailto:erlang-questions-bounces@erlang.org">erlang-questions-bounces@erlang.org</a>] On Behalf Of Matej Kosik<br>Sent: Tuesday, December 04, 2007 14:36<br>To: <a href="mailto:erlang-questions@erlang.org">

erlang-questions@erlang.org</a><br>Subject: [erlang-questions] clarify: how to express this elegantly<br><br>-----BEGIN PGP SIGNED MESSAGE-----<br>Hash: SHA1<br><br>Friends,<br><br>I wander, how can I express this:<br><br>

    case Value of<br>        "state" -><br>            ?D,<br>            circuit_monitor:plot_node_value(CircuitMonitorPid, Socket,<br>                RequestId, CircuitId, FromDateTime, ToDateTime, Width,<br>

Height, Value             );         "rx_bit_rate" ->             ?D,             circuit_monitor:plot_node_value(CircuitMonitorPid, Socket,                 RequestId, CircuitId, FromDateTime, ToDateTime, Width,

<br>Height, Value<br>            );<br>        "tx_bit_rate" -><br>            ?D,<br>            circuit_monitor:plot_node_value(CircuitMonitorPid, Socket,<br>                RequestId, CircuitId, FromDateTime, ToDateTime, Width,

<br>Height, Value<br>            );<br>        "ebno" -><br>            ?D,<br>            circuit_monitor:plot_node_value(CircuitMonitorPid, Socket,<br>                RequestId, CircuitId, FromDateTime, ToDateTime, Width,

<br>Height, Value<br>            );<br>        "packetloss" -><br>            ?D,<br>            node_pinger:plot_node_value(NodePingerPid, Socket,<br>                RequestId, CircuitId, FromDateTime, ToDateTime, Width,

<br>Height, Value<br>            );<br>        "rtt" -><br>            ?D,<br>            node_pinger:plot_node_value(NodePingerPid, Socket,<br>                RequestId, CircuitId, FromDateTime, ToDateTime, Width,

<br>Height, Value<br>            )<br>    end<br><br>more elegantly. Via some kind of "variant patterns" such as:<br><br>    case Value of<br>        "state" | "rx_bit_rate" | "tx_bit_rate" | "ebno" ->

<br>            ?D,<br>            circuit_monitor:plot_node_value(CircuitMonitorPid, Socket,<br>                RequestId, CircuitId, FromDateTime, ToDateTime, Width,<br>Height, Value<br>            );<br>        "packet_loss" | "round_trip_time" ->

<br>            ?D,<br>            node_pinger:plot_node_value(NodePingerPid, Socket,<br>                RequestId, CircuitId, FromDateTime, ToDateTime, Width,<br>Height, Value<br>            )<br>    end<br><br>but these do not exist :(

<br>These "variant patterns" could be introduced without any problems in special<br>cases when neither<br>variant contains unbound variable.<br>- --<br>Matej Kosik<br>-----BEGIN PGP SIGNATURE-----<br>Version: GnuPG 

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</a><br><a href="http://www.erlang.org/mailman/listinfo/erlang-questions" target="_blank">http://www.erlang.org/mailman/listinfo/erlang-questions</a><br></div></div></blockquote></div><br>