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POIs there an easier way to modify a value in a subsubsub record field in Erlang?
 

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  1. POIs there an easier way to modify a value in a subsubsub record field in Erlang?
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    <p>So I've got a fairly deep hierarchy of record definitions:</p> <pre><code>-record(cat, {name = '_', attitude = '_',}). -record(mat, {color = '_', fabric = '_'}). -record(packet, {cat = '_', mat = '_'}). -record(stamped_packet, {packet = '_', timestamp = '_'}). -record(enchilada, {stamped_packet = '_', snarky_comment = ""}). </code></pre> <p>And now I've got an enchilada, and I want to make a new one that's just like it except for the value of one of the subsubsubrecords. Here's what I've been doing.</p> <pre><code>update_attitude(Ench0, NewState) when is_record(Ench0, enchilada)-&gt; %% Pick the old one apart. #enchilada{stamped_packet = SP0} = Ench0, #stamped_packet{packet = PK0} = SP0, #packet{cat = Tag0} = PK0, %% Build up the new one. Tude1 = Tude0#cat{attitude = NewState}, PK1 = PK0#packet{cat = Tude1}, SP1 = SP0#stamped_packet{packet = PK1}, %% Thank God that's over. Ench0#enchilada{stamped_packet = SP1}. </code></pre> <p>Just <em>thinking</em> about this is painful. Is there a better way?</p>
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