Velocity is the only language where Brevity for Brevity's Sake is OK.

    In other languages, reducing total lines of code (LOC) with show-offy shortcuts just means your code will make no sense (to you or anyone else) after a few months away.

    But in Velocity, the shortest possible implementation is a smart move, since:

    • VTL is verbose (only one major operation permitted per line, temp variables required even for void methods)
    • it offers limited reusability (especially Marketo's flavor of Velocity, where #macro and reused $references don't work consistently)
    • it's completely whitespace-preserving (indenting would help readability, but messes up output — so the fewer lines, the less to mess up)
    • the more lines of code in your template, the more distraction from the “meat,” which is the output

    Imagine you had a few Lead fields using the JETDS naming system: installationEnvironment, typeOfEquipment, and purpose.

    There are 10-20 options for each of these fields, so the number of total combinations is huge. Even if you're only interested in a subset, the conditions get loooooong...

 

#* 
I'm being generous with whitespace here, 
but it's *still* hard to read/maintain! 
VTL is whitespace-preserving, so indents are true spaces.
*#
#if( $lead.installationEnvironment == "amphibious" )
 #if( $lead.typeOfEquipment == "radar" )
   #if( $lead.purpose == "receiving" )
   do something...
   #elseif( $lead.purpose == "detecting" )
   do something else...
   #elseif( $lead.purpose == "navigation-aid" )
   do something else entirely...
   #end
 #elseif ( $lead.typeOfEquipment == "sonar" )
   #if( $lead.purpose == "receiving" )
   do yet another thing...
   #elseif( $lead.purpose == "detecting" )
   do still another thing...
   #elseif( $lead.purpose == "navigation-aid" )
   ...
   #end
 #end
#elseif( $lead.installationEnvironment == "ground-mobile" )
 #if( $lead.typeOfEquipment == "radar" )
   #if( $lead.purpose == "receiving" )
   ...
   #elseif( $lead.purpose == "detecting" )
   ...
   #elseif( $lead.purpose == "navigation-aid" )
   ...
   #end
 #end
#end
## etc., etc.

 

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