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<div>Except it penalizes us bad spellers. ;)<br>
<br>
Kevin <strong>
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<font face="Tahoma" size="2"><b>From:</b> Clint Byrum<br>
<b>Sent:</b> Wednesday, November 05, 2014 11:26:43 PM<br>
<b>To:</b> openstack-dev<br>
<b>Subject:</b> Re: [openstack-dev] [Heat] New function: first_nonnull<br>
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<div class="PlainText">Excerpts from Lee, Alexis's message of 2014-11-05 15:46:43 +0100:<br>
> I'm considering adding a function which takes a list and returns the first<br>
> non-null, non-empty value in that list.<br>
> <br>
> So you could do EG:<br>
> <br>
> some_thing:<br>
> config:<br>
> ControlVIP:<br>
> first_nonnull:<br>
> - {get_param: ControlVIP}<br>
> - {get_attr: [ControlVirtualIP, fixed_ips, 0, ip_address]}]}<br>
> <br>
> I'm open to other names, EG "some", "or", "fallback_list" etc.<br>
> <br>
> Steve Hardy suggested building this into get_attr or Fn::Select. My feeling<br>
> is that those each do one job well right now, I'm happy to take a steer<br>
> though.<br>
> <br>
> What do you think please?<br>
> <br>
<br>
Yes this is super useful for writing responsive, reusable templates.<br>
<br>
I'd like to suggest that this be called 'coalesce' as that is what SQL<br>
calls it.<br>
<br>
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